diff --git a/aufgabengenerator_formulas_fraction_new_c.py b/aufgabengenerator_formulas_fraction_new_c.py
new file mode 100644
index 0000000..0e4037f
--- /dev/null
+++ b/aufgabengenerator_formulas_fraction_new_c.py
@@ -0,0 +1,594 @@
+import random
+import operator
+import re
+from math import gcd, lcm
+import xml.etree.ElementTree as ET
+from collections import Counter
+
+# Define operators and their corresponding functions
+ops = {
+    '+': operator.add,
+    '-': operator.sub,
+    '*': operator.mul,
+    '/': operator.truediv
+}
+
+# Konstanten
+# Anzahl der zu generierenden Fragen.
+NUM_QUESTIONS = 5
+# Algebraische Struktur der Aufgaben
+STRUCTURE = "(+)-((+)-(+))"
+# Gleiche Nenner erlauben
+SAME_ALLOWED = True
+# Größter Zähler
+MAX_NUMERATOR = 10
+# Größter Nenner
+MAX_DENOMINATOR = 8
+# Größter erlaubter gemeinsamer Nenner
+MAX_COMMON_DENOMINATOR = 100
+# Dateiname für Ausgabe
+FILENAME = 'formulas_new_quiz.xml'
+
+
+def parse_expression(expression):
+    """Parse an algebraic expression and determine the required number of numbers.
+
+    Args:
+        expression (str): The algebraic expression to parse.
+
+    Returns:
+        int: The total number of numbers required for the expression.
+    """
+    op_count = 0
+
+    # Count operators in parentheses
+    paren_count = 1
+    max_depth = 0
+
+    for i, char in enumerate(expression):
+        if char in ops.keys():
+            op_count += 1
+
+    return max_depth + op_count + 1
+
+
+# Anzahl der benötigten Brüche
+NUM_FRACTIONS = parse_expression(STRUCTURE)
+
+
+def add_placeholders(expression):
+    """Add placeholders to the expression for calculation.
+
+    Args:
+        expression (str): The algebraic expression to modify.
+
+    Returns:
+        str: The modified expression with placeholders.
+    """
+    placeholder_counter = 0  # Zähler für die Platzhalter
+
+    def placeholder_generator():
+        nonlocal placeholder_counter
+        placeholder = f'n{placeholder_counter}'
+        placeholder_counter += 1
+        return placeholder
+
+    output = []  # Ausgabe als Liste zum späteren Zusammensetzen
+    need_placeholder = True  # Flag, um zu tracken, ob ein Platzhalter hinzugefügt werden soll
+
+    for char in expression:
+        if char in '+-*/':  # Operator gefunden
+            if need_placeholder:  # Wenn wir einen Platzhalter brauchen
+                output.append(placeholder_generator())
+            output.append(char)  # Fügen Sie den Operator hinzu
+            need_placeholder = True  # Nach einem Operator müssen wir wieder einen Platzhalter hinzufügen
+        elif char == '(':  # Eine neue Sub-Expression beginnt
+            output.append(char)  # Fügen Sie die öffnende Klammer hinzu
+            need_placeholder = True
+        elif char == ')':  # Eine Sub-Expression endet
+            if need_placeholder:  # Wenn wir einen Platzhalter brauchen
+                output.append(placeholder_generator())
+            output.append(char)  # Fügen Sie die schließende Klammer hinzu
+            need_placeholder = False  # Nach einer schließenden Klammer erwarten wir keine Platzhalter mehr
+        else:  # Bei anderen Zeichen
+            if need_placeholder:  # Wenn wir einen Platzhalter brauchen
+                output.append(placeholder_generator())
+            output.append(char)  # Fügen Sie das Zeichen hinzu
+            need_placeholder = False  # Nach einem Platzhalter sollten wir keinen weiteren setzen
+
+    # Platzhalter am Beginn hinzufügen
+    if output and not (output[0] == f'n{0}' or output[0] == '('):
+        result = [placeholder_generator()] + output
+    else:
+        result = output
+    # Platzhalter am Ende hinzufügen, wenn nötig
+    if output[-1] in '+-*/':
+        result = result + [placeholder_generator()]
+    else:
+        pass
+
+    # Zusammensetzen des finalen Ausdrucks
+    final_expression = ''.join(result).strip()
+    print(final_expression)
+    return final_expression
+
+
+# Algebraische Struktur mit Platzhaltern
+STRUCTURE_PH = add_placeholders(STRUCTURE)
+
+
+def calculate(expression, numbers):
+    """Calculate the result of the expression using provided numbers.
+
+    Args:
+        expression (str): The algebraic expression with placeholders.
+        numbers (list): A list of numbers to replace the placeholders.
+
+    Returns:
+        float: The calculated result of the expression.
+    """
+    print(numbers)
+    # Replace placeholders with actual number values
+    for i, num in enumerate(numbers):
+        placeholder = f'n{i}'
+        expression = re.sub(rf'\{placeholder}\s*([+-/*])', rf'{num} \1', expression)
+        expression = re.sub(rf'({placeholder})\s*', rf'{num}', expression)
+
+    print(expression)
+    # Evaluate the result
+    return eval(expression)
+
+
+def gen_calculate_string(expression: str, liststring: str):
+    """Generate a calculation string for the expression with actual number values.
+
+    Args:
+        expression (str): The algebraic expression with placeholders.
+        liststring (str): The list of values to replace the placeholders.
+
+    Returns:
+        str: The modified expression with the list values.
+    """
+    for i in range(NUM_FRACTIONS):
+        placeholder = f'n{i}'
+        expression = re.sub(rf'\{placeholder}\s*([+-/*])', rf'{liststring}[{i}] \1', expression)
+        expression = re.sub(rf'({placeholder})\s*', rf'{liststring}[{i}]', expression)
+
+    print(expression)
+    return expression
+
+
+def gen_latex_calculate_string(expression: str, liststring: str):
+    """Generate a LaTeX-compatible calculation string for the expression.
+
+    Args:
+        expression (str): The algebraic expression with placeholders.
+        liststring (str): A list of LaTeX strings to replace the placeholders.
+
+    Returns:
+        str: The modified expression formatted for LaTeX.
+    """
+    for i in range(NUM_FRACTIONS):
+        placeholder = f'n{i}'
+        replacement = liststring[i]
+        print(replacement)
+        expression = re.sub(rf'\{placeholder}\s*([+-/*])', replacement, expression)
+        expression = re.sub(rf'({placeholder})\s*', replacement, expression)
+
+    # Klammern anpassen
+    expression = re.sub(rf'\(', u'\\\\left(', expression)
+    expression = re.sub(rf'\)', u'\\\\right)', expression)
+    return expression
+
+
+def create_html_table_for_fracture_input(rows: list):
+    """Create an HTML table for displaying fraction inputs.
+
+    Args:
+        rows (list): A list of rows to include in the table.
+
+    Returns:
+        str: The generated HTML table as a string.
+    """
+    table_rows = []
+    for i, row in enumerate(rows):
+        if (i % 2) == 0:
+            table_row = "<tr style='border-bottom: 1px solid black;'>"
+        else:
+            table_row = "<tr>"
+
+        for cell in row:
+            table_row += f"<td style='padding: 5px;'>{cell}</td>"
+
+        table_row += "</tr>"
+        table_rows.append(table_row)
+
+    # Tabelle zusammenbauen
+    table_html = f"<table style='border-collapse: collapse; display: inline-table;'>\n" + "\n".join(table_rows) + "</table>"
+
+    return table_html
+
+
+def create_formula_question(ex_number: int):
+    """Create a formula question based on a random set of fractions.
+
+    Args:
+        ex_number (int): The index number of the exercise being created.
+
+    Returns:
+        Element: The XML element representing the question.
+    """
+    numerators = []
+    denominators = []
+    for i in range(NUM_FRACTIONS):
+        n = random.randint(1, MAX_NUMERATOR)
+        d = random.randint(2, MAX_DENOMINATOR)
+        numerators.append(n)
+        denominators.append(d)
+
+    # Müssen Nenner unterschiedlich sein?
+    if not SAME_ALLOWED:
+        # Sicherstellen, dass die Nenner unterschiedlich sind
+        same_denominators = [k for k, v in Counter(denominators).items() if v > 1]
+        while len(same_denominators) > 1:
+            new_denom = random.randint(2, MAX_DENOMINATOR)
+            try:
+                index = denominators.index(same_denominators[0])
+                denominators[index] = new_denom
+            except ValueError:
+                pass
+            same_denominators = [k for k, v in Counter(denominators).items() if v > 1]
+    else:
+        pass
+
+    # Hauptnenner bestimmen
+    *denoms_integers, = denominators  # Entpacken der Liste
+    common_denominator = lcm(*denoms_integers)
+    cd = common_denominator
+
+    fractions = []
+    for i in range(NUM_FRACTIONS):
+        fraction = {"n": numerators[i], "d": denominators[i]}
+        fractions.append(fraction)
+
+    expanded_numerators = [frac["n"] * cd // frac["d"] for frac in fractions]
+
+    expanded_fractions = []
+    for i in range(NUM_FRACTIONS):
+        fraction = {"n": expanded_numerators[i], "d": cd}
+        expanded_fractions.append(fraction)
+
+    result_numerator = calculate(STRUCTURE_PH, expanded_numerators)
+
+    gcd_result = gcd(result_numerator, cd)
+    if gcd_result > 1:
+        shortable = True
+        shortened_numerator = result_numerator // gcd_result
+        shortened_denominator = common_denominator // gcd_result
+    else:
+        shortable = False
+
+    # Start der Aufgabe
+    question = ET.Element('question', attrib={'type': 'formulas'})
+
+    # Name der Aufgabe
+    has_plus = '+' in STRUCTURE
+    has_minus = '-' in STRUCTURE
+    has_mult = '*' in STRUCTURE
+    has_div = '/' in STRUCTURE
+
+    if has_plus and has_minus:
+        expression_type = "Addition/Subtraktion" + f" ({STRUCTURE})"
+        exercise_text = "Berechne den Term"
+    elif has_plus:
+        expression_type = "Addition" + f" ({STRUCTURE})"
+        exercise_text = "Addiere die Brüche"
+    elif has_minus:
+        expression_type = "Subtraktion" + f" ({STRUCTURE})"
+        exercise_text = "Subtrahiere die Brüche"
+    else:
+        expression_type = "Rechnung" + f" ({STRUCTURE})"
+        exercise_text = "Berechne den Term"
+    name_elem = ET.SubElement(question, 'name')
+    text_elem = ET.SubElement(name_elem, 'text')
+    text_elem.text = f'{expression_type} von {NUM_FRACTIONS} ungleichnamigen Brüchen {ex_number}'
+
+    # Allgemeiner Aufgabentext
+    questiontext_elem = ET.SubElement(question, 'questiontext', attrib={'format': 'html'})
+    text_elem = ET.SubElement(questiontext_elem, 'text')
+    if shortable:
+        text_elem.text = f"<![CDATA[ <p>{exercise_text} und kürze das Ergebnis so weit wie möglich.</p>" + "<p>{#A} </p> ]]>"
+    else:
+        text_elem.text = f"<![CDATA[ <p>{exercise_text}.</p>"+"<p>{#A} </p> ]]>"
+
+    # Allgemeines Feedback
+    generalfeedback_elem = ET.SubElement(question, 'generalfeedback', attrib={'format': 'html'})
+    text_elem = ET.SubElement(generalfeedback_elem, 'text')
+    text_elem.text = ' '
+
+    # Grundlegende Bewertungsinformationen
+    ET.SubElement(question, 'defaultgrade').text = '1.0000000'
+    ET.SubElement(question, 'penalty').text = '0.3333333'
+    ET.SubElement(question, 'hidden').text = '0'
+    ET.SubElement(question, 'idnumber').text = ' '
+
+    # Feedback für korrekte und inkorrekte Antworten
+    correctfeedback_elem = ET.SubElement(question, 'correctfeedback', attrib={'format': 'html'})
+    text_elem = ET.SubElement(correctfeedback_elem, 'text')
+    text_elem.text = '''<![CDATA[ <p>Die Antwort ist richtig.</p> ]]> '''
+
+    partiallycorrectfeedback_elem = ET.SubElement(question, 'partiallycorrectfeedback', attrib={'format': 'html'})
+    text_elem = ET.SubElement(partiallycorrectfeedback_elem, 'text')
+    text_elem.text = '''<![CDATA[ <p>Die Antwort ist teilweise richtig.</p> ]]> '''
+
+    incorrectfeedback_elem = ET.SubElement(question, 'incorrectfeedback', attrib={'format': 'html'})
+    text_elem = ET.SubElement(incorrectfeedback_elem, 'text')
+    text_elem.text = '''<![CDATA[ <p>Die Antwort ist falsch.</p> ]]>'''
+
+    ET.SubElement(question, 'shownumcorrect')
+
+    varsrandom_elem = ET.SubElement(question, 'varsrandom')
+    text_elem = ET.SubElement(varsrandom_elem, 'text')
+    text_elem.text = f' '
+
+    # Globale Variablen definieren
+    varsglobal_elem = ET.SubElement(question, 'varsglobal')
+    text_elem = ET.SubElement(varsglobal_elem, 'text')
+    numerators_string = ",".join([str(n) for n in numerators])
+    denominators_string = ",".join([str(d) for d in denominators])
+    text_elem.text = f'n = [{numerators_string}];\n d = [{denominators_string}];'
+
+    # Durchnummerierung der Antworten
+    answernumbering_elem = ET.SubElement(question, 'answernumbering')
+    text_elem = ET.SubElement(answernumbering_elem, 'text')
+    text_elem.text = 'ABCD'
+
+    # Antworten definieren
+    answers_elem = ET.SubElement(question, 'answers')
+
+    # Indizes für die Antworten
+    partindex_elem = ET.SubElement(answers_elem, 'partindex')
+    ET.SubElement(partindex_elem, 'text').text = '0'
+    placeholder_elem = ET.SubElement(answers_elem, 'placeholder')
+    ET.SubElement(placeholder_elem, 'text').text = '#A'
+
+    # Punktzahl auf Teilaufgabe
+    answermark_elem = ET.SubElement(answers_elem, 'answermark')
+    if shortable:
+        ET.SubElement(answermark_elem, 'text').text = '2'
+    else:
+        ET.SubElement(answermark_elem, 'text').text = '1'
+
+    # Antworttyp
+    answertype_elem = ET.SubElement(answers_elem, 'answertype')
+    ET.SubElement(answertype_elem, 'text').text = '0'
+    numbox_elem = ET.SubElement(answers_elem, 'numbox')
+    ET.SubElement(numbox_elem, 'text').text = '2'
+
+    # Berechnungsvariablen
+    # common divisor
+    cdtext = ""
+    for i in range(NUM_FRACTIONS):
+        if i == 0:
+            pass
+        elif i == 1:
+            cdtext += f"cd{i} = lcm(d[{i}],d[{i-1}]);"
+        else:
+            cdtext += f"cd{i} = lcm(cd{i-1}, d[{i}]);"
+    cdtext += f"cd = cd{NUM_FRACTIONS-1};"
+
+    # expansions
+    extext = "e = ["
+    for i in range(NUM_FRACTIONS):
+        extext += f"cd / d[{i}],"
+    extext = extext[:-1]
+    extext += "];"
+
+    # expanded_numerators
+    entext = "ens = ["
+    for i in range(NUM_FRACTIONS):
+        entext += f"n[{i}]*e[{i}],"
+    entext = entext[:-1]
+    entext += "];"
+
+    # result numerator
+    resnum = "resnum = " + gen_calculate_string(STRUCTURE_PH, "ens") + ";"
+
+    # gcd of result numerator and result (common) denominator
+    resgcd = "resgcd = gcd(resnum, cd);"
+
+    # shortened result numerator
+    sresnum = "sresnum = resnum / resgcd;"
+
+    # shortened result denominator
+    sresden = "sresden = cd / resgcd;"
+
+    vars1_elem = ET.SubElement(answers_elem, 'vars1')
+    if shortable:
+        vars1_elem_text = f"<![CDATA[{cdtext}\n {extext}\n {entext}\n {resnum}\n {resgcd}\n {sresnum}\n {sresden}]]>"
+    else:
+        vars1_elem_text = f"<![CDATA[{cdtext}\n {extext}\n {entext}\n {resnum}]]>"
+    ET.SubElement(vars1_elem, 'text').text = vars1_elem_text
+
+    # Antwort
+    answer_elem = ET.SubElement(answers_elem, 'answer')
+    if shortable:
+        answer_text = '[resnum, cd, sresnum, sresden]'
+    else:
+        answer_text = '[resnum, cd]'
+    ET.SubElement(answer_elem, 'text').text = answer_text
+
+    answernotunique_elem = ET.SubElement(answers_elem, 'answernotunique')
+    ET.SubElement(answernotunique_elem, 'text').text = '0'
+
+    vars2_elem = ET.SubElement(answers_elem, 'vars2')
+    if shortable:
+        vars2_elem_text = "<![CDATA[ ga = _0 == resnum && _1 == cd;\n gb = (_0 / _1) == (resnum / cd);\n gsa = _2 == sresnum && _3 == sresden;\n gsb = (_2 / _3) == (sresnum / sresden); ]]>"
+    else:
+        vars2_elem_text = "<![CDATA[ ga = _0 == resnum && _1 == cd; gb = (_0 / _1) == (resnum / cd); ]]>"
+    ET.SubElement(vars2_elem, 'text').text = vars2_elem_text
+
+    correctness_elem = ET.SubElement(answers_elem, 'correctness')
+    if shortable:
+        ET.SubElement(correctness_elem, 'text').text = '0.25*ga + 0.25*gb + 0.25*gsa + 0.25*gsb'
+    else:
+        ET.SubElement(correctness_elem, 'text').text = '0.5*ga + 0.5*gb'
+
+    unitpenalty_elem = ET.SubElement(answers_elem, 'unitpenalty')
+    ET.SubElement(unitpenalty_elem, 'text').text = '1'
+
+    postunit_elem = ET.SubElement(answers_elem, 'postunit')
+    ET.SubElement(postunit_elem, 'text').text = ' '
+
+    ruleid_elem = ET.SubElement(answers_elem, 'ruleid')
+    ET.SubElement(ruleid_elem, 'text').text = '1'
+
+    otherrule_elem = ET.SubElement(answers_elem, 'otherrule')
+    ET.SubElement(otherrule_elem, 'text').text = ' '
+
+    # Unterfragen-Text
+    subqtext_elem = ET.SubElement(answers_elem, 'subqtext', attrib={'format': 'html'})
+
+    fractions_latex_strings = []
+    for i in range(NUM_FRACTIONS):
+        l_str = "\\\\frac{{"+ f"n[{i}]" +"}}{{"+ f"d[{i}]" +"}}"
+        fractions_latex_strings.append(l_str)
+    latex_calculation = gen_latex_calculate_string(STRUCTURE_PH, fractions_latex_strings)
+
+    sub_q_t_begin = "<![CDATA[ <p>Berechne:</p>"
+    sub_q_t_math = "<p>\$\\Large \\displaystyle " + f"{latex_calculation}" + "=\$</p>"
+    rows_list = [
+        ["Zähler:", "{_0}"],
+        ["Nenner:", "{_1}"]
+    ]
+
+    sub_q_t_input = '<div style="display: inline-table"> ='
+    if shortable:
+        sub_q_t_input += create_html_table_for_fracture_input(rows_list)
+
+        rows_list_s = [["Gekürzter Zähler:", "{_2}"],
+                       ["Gekürzter Nenner:", "{_3}"]]
+        sub_q_t_input += " = "
+        sub_q_t_input += create_html_table_for_fracture_input(rows_list_s)
+
+    else:
+        sub_q_t_input += create_html_table_for_fracture_input(rows_list)
+    sub_q_t_input += '</div>'
+    sub_q_t_end = "]]>"
+
+    sub_question_text = sub_q_t_begin + sub_q_t_math + sub_q_t_input + sub_q_t_end
+    ET.SubElement(subqtext_elem, 'text').text = sub_question_text
+
+    expanded_fractions_latex_strings = []
+    for i in range(NUM_FRACTIONS):
+        l_str = "\\\\frac{{"+ f"ens[{i}]" +"}}{{"+ f"cd" +"}}"
+        expanded_fractions_latex_strings.append(l_str)
+    expanded_latex_calculation = gen_latex_calculate_string(STRUCTURE_PH, expanded_fractions_latex_strings)
+
+    # Lösungshinweis
+    feedback_elem = ET.SubElement(answers_elem, 'feedback', attrib={'format': 'html'})
+    if shortable:
+        feedback_text = '''<![CDATA[ <h4>Lösungshinweis</h4>
+                           <p>Die korrekte Lösung ist:</p>
+                           <p>\$\\displaystyle''' + f"{latex_calculation}" +" = " + f"{expanded_latex_calculation}" + ''' = \\frac{{resnum}}{{cd}} = \\frac{{sresnum}}{{sresden}} \$ </p> ]]>'''
+    else:
+        feedback_text = '''<![CDATA[ <h4>Lösungshinweis</h4>
+                           <p>Die korrekte Lösung ist:</p>
+                           <p>\$ \\displaystyle ''' + f"{latex_calculation}" +" = " + f"{expanded_latex_calculation}" + ''' = \\frac{{resnum}}{{cd}} \$ </p> ]]>'''
+    ET.SubElement(feedback_elem, 'text').text = feedback_text
+
+    # correctfeedback
+    correctfeedback_elem = ET.SubElement(answers_elem, 'correctfeedback', attrib={'format': 'html'})
+    correctfeedback_text = '''<![CDATA[ <p>Richtig!</p>]]>'''
+    ET.SubElement(correctfeedback_elem, 'text').text = correctfeedback_text
+
+    # partially correct feedback
+    pcorrectfeedback_elem = ET.SubElement(answers_elem, 'partiallycorrectfeedback', attrib={'format': 'html'})
+    pcorrectfeedback_text = '''<![CDATA[ <p>Teilweise richtig.</p>]]>'''
+    ET.SubElement(pcorrectfeedback_elem, 'text').text = pcorrectfeedback_text
+
+    # incorrect feedback
+    incorrectfeedback_elem = ET.SubElement(answers_elem, 'incorrectfeedback', attrib={'format': 'html'})
+    incorrectfeedback_text = '''<![CDATA[ <p>Leider nicht richtig.</p>]]>'''
+    ET.SubElement(incorrectfeedback_elem, 'text').text = incorrectfeedback_text
+
+    return question
+
+def generate_questions(num_questions):
+    """Generates a list of questions.
+
+    Args:
+        num_questions (int): The number of questions to generate.
+
+    Returns:
+        list: A list of question elements.
+    """
+    questions = []
+    for i in range(num_questions):
+        questions.append(create_formula_question(i))
+
+    return questions
+
+def create_quiz(questions):
+    """Creates the overall quiz element.
+
+    Args:
+        questions (list): A list of question elements.
+
+    Returns:
+        Element: The complete quiz element.
+    """
+    quiz = ET.Element('quiz')
+    for q in questions:
+        quiz.append(q)
+    return quiz
+
+def save_to_file(xml_element, filename):
+    """Saves the XML document to a file.
+
+    Args:
+        xml_element (Element): The XML element to save.
+        filename (str): The name of the target file.
+
+    Returns:
+        None
+    """
+    tree = ET.ElementTree(xml_element)
+    ET.indent(tree, space="\t", level=0)
+    with open(filename, 'wb') as f:
+        tree.write(f, encoding='utf_8', xml_declaration=True)
+
+    return 0
+
+def replace_vars2(xml_file):
+    """Replaces special characters in the XML file.
+
+    Args:
+        xml_file (str): The name of the XML file to modify.
+
+    Returns:
+        None
+    """
+    # XML-Datei lesen
+    with open(xml_file, 'r') as f:
+        text = f.read()
+
+    text = text.replace("&amp;", "&")
+    text = text.replace("&lt;", "<")
+    text = text.replace("&gt;", ">")
+
+    with open(xml_file, 'w') as f:
+        f.write(text)
+
+    print("Ersetzungen abgeschlossen.")
+
+# Hauptprogramm
+if __name__ == "__main__":
+    questions = generate_questions(NUM_QUESTIONS)
+    quiz = create_quiz(questions)
+
+    save_to_file(quiz, FILENAME)
+    replace_vars2(FILENAME)
+
+    print("Moodle-XMLDatei erfolgreich erstellt.")
+
diff --git a/aufgabengenerator_formulas_gem_fraction_new.py b/aufgabengenerator_formulas_gem_fraction_new.py
new file mode 100644
index 0000000..69ec8fa
--- /dev/null
+++ b/aufgabengenerator_formulas_gem_fraction_new.py
@@ -0,0 +1,252 @@
+import random
+import operator
+import re
+from math import gcd, lcm
+import xml.etree.ElementTree as ET
+from collections import Counter
+
+# Define operators and their corresponding functions
+ops = {
+    '+': operator.add,
+    '-': operator.sub,
+    '*': operator.mul,
+    '/': operator.truediv
+}
+
+# Konstanten
+NUM_QUESTIONS = 5
+STRUCTURE = "(+)-((+)-(+))"
+SAME_ALLOWED = True
+MAX_WHOLE = 5  # Größte ganze Zahl für gemischte Brüche
+MAX_NUMERATOR = 10  # Größter Zähler
+MAX_DENOMINATOR = 8  # Größter Nenner
+MAX_COMMON_DENOMINATOR = 100
+FILENAME = 'formulas_new_quiz.xml'
+
+def parse_expression(expression):
+    op_count = 0
+    for char in expression:
+        if char in ops.keys():
+            op_count += 1
+    return op_count + 1
+
+NUM_FRACTIONS = parse_expression(STRUCTURE)
+
+def add_placeholders(expression):
+    placeholder_counter = 0
+    def placeholder_generator():
+        nonlocal placeholder_counter
+        placeholder = f'n{placeholder_counter}'
+        placeholder_counter += 1
+        return placeholder
+
+    output = []
+    need_placeholder = True
+
+    for char in expression:
+        if char in '+-*/':
+            if need_placeholder:
+                output.append(placeholder_generator())
+            output.append(char)
+            need_placeholder = True
+        elif char == '(':
+            output.append(char)
+            need_placeholder = True
+        elif char == ')':
+            if need_placeholder:
+                output.append(placeholder_generator())
+            output.append(char)
+            need_placeholder = False
+        else:
+            if need_placeholder:
+                output.append(placeholder_generator())
+            output.append(char)
+            need_placeholder = False
+
+    if output and not (output[0] == f'n{0}' or output[0] == '('):
+        result = [placeholder_generator()] + output
+    else:
+        result = output
+    if output[-1] in '+-*/':
+        result = result + [placeholder_generator()]
+
+    final_expression = ''.join(result).strip()
+    return final_expression
+
+STRUCTURE_PH = add_placeholders(STRUCTURE)
+
+def calculate(expression, numbers):
+    for i, num in enumerate(numbers):
+        placeholder = f'n{i}'
+        expression = re.sub(rf'\{placeholder}\s*([+-/*])', rf'{num} \1', expression)
+        expression = re.sub(rf'({placeholder})\s*', rf'{num}', expression)
+    return eval(expression)
+
+def create_mixed_fraction():
+    """Generates a random mixed fraction represented as a dictionary."""
+    whole = random.randint(1, MAX_WHOLE)
+    numerator = random.randint(1, MAX_NUMERATOR)
+    denominator = random.randint(2, MAX_DENOMINATOR)
+    return {
+        "whole": whole,
+        "numerator": numerator,
+        "denominator": denominator
+    }
+
+def create_formula_question(ex_number: int):
+    numerators = []
+    denominators = []
+    mixed_fractions = []
+
+    for i in range(NUM_FRACTIONS):
+        mixed_fraction = create_mixed_fraction()
+        mixed_fractions.append(mixed_fraction)
+        # Convert mixed fraction to improper fraction for calculation
+        improper_numerator = mixed_fraction["whole"] * mixed_fraction["denominator"] + mixed_fraction["numerator"]
+        numerators.append(improper_numerator)
+        denominators.append(mixed_fraction["denominator"])
+
+    if not SAME_ALLOWED:
+        same_denominators = [k for k, v in Counter(denominators).items() if v > 1]
+        while len(same_denominators) > 1:
+            new_denom = random.randint(2, MAX_DENOMINATOR)
+            try:
+                index = denominators.index(same_denominators[0])
+                denominators[index] = new_denom
+            except ValueError:
+                pass
+            same_denominators = [k for k, v in Counter(denominators).items() if v > 1]
+
+    *denoms_integers, = denominators
+    common_denominator = lcm(*denoms_integers)
+    expanded_numerators = [(frac["whole"] * frac["denominator"] + frac["numerator"]) * common_denominator // frac["denominator"] for frac in mixed_fractions]
+
+    result_numerator = calculate(STRUCTURE_PH, expanded_numerators)
+
+    gcd_result = gcd(result_numerator, common_denominator)
+    shortable = gcd_result > 1
+    shortened_numerator = result_numerator // gcd_result if shortable else result_numerator
+    shortened_denominator = common_denominator // gcd_result if shortable else common_denominator
+
+    question = ET.Element('question', attrib={'type': 'formulas'})
+    has_plus = '+' in STRUCTURE
+    has_minus = '-' in STRUCTURE
+
+    if has_plus and has_minus:
+        expression_type = "Addition/Subtraktion"
+        exercise_text = "Berechne den Term"
+    elif has_plus:
+        expression_type = "Addition"
+        exercise_text = "Addiere die gemischten Brüche"
+    elif has_minus:
+        expression_type = "Subtraktion"
+        exercise_text = "Subtrahiere die gemischten Brüche"
+    else:
+        expression_type = "Rechnung"
+        exercise_text = "Berechne den Term"
+
+    name_elem = ET.SubElement(question, 'name')
+    text_elem = ET.SubElement(name_elem, 'text')
+    text_elem.text = f'{expression_type} von {NUM_FRACTIONS} gemischten Brüchen {ex_number}'
+
+    questiontext_elem = ET.SubElement(question, 'questiontext', attrib={'format': 'html'})
+    text_elem = ET.SubElement(questiontext_elem, 'text')
+    text_elem.text = f"<![CDATA[ <p>{exercise_text} und kürze das Ergebnis so weit wie möglich.</p>" + "<p>{#A} </p> ]]>"
+
+    generalfeedback_elem = ET.SubElement(question, 'generalfeedback', attrib={'format': 'html'})
+    text_elem = ET.SubElement(generalfeedback_elem, 'text')
+    text_elem.text = ' '
+
+    ET.SubElement(question, 'defaultgrade').text = '1.0000000'
+    ET.SubElement(question, 'penalty').text = '0.3333333'
+    ET.SubElement(question, 'hidden').text = '0'
+
+    correctfeedback_elem = ET.SubElement(question, 'correctfeedback', attrib={'format': 'html'})
+    text_elem = ET.SubElement(correctfeedback_elem, 'text')
+    text_elem.text = '''<![CDATA[ <p>Die Antwort ist richtig.</p> ]]> '''
+
+    partiallycorrectfeedback_elem = ET.SubElement(question, 'partiallycorrectfeedback', attrib={'format': 'html'})
+    text_elem = ET.SubElement(partiallycorrectfeedback_elem, 'text')
+    text_elem.text = '''<![CDATA[ <p>Die Antwort ist teilweise richtig.</p> ]]> '''
+
+    incorrectfeedback_elem = ET.SubElement(question, 'incorrectfeedback', attrib={'format': 'html'})
+    text_elem = ET.SubElement(incorrectfeedback_elem, 'text')
+    text_elem.text = '''<![CDATA[ <p>Die Antwort ist falsch.</p> ]]>'''
+
+    varsrandom_elem = ET.SubElement(question, 'varsrandom')
+    text_elem = ET.SubElement(varsrandom_elem, 'text')
+    text_elem.text = f' '
+
+    varsglobal_elem = ET.SubElement(question, 'varsglobal')
+    text_elem = ET.SubElement(varsglobal_elem, 'text')
+    numerators_string = ",".join([str(n) for n in numerators])
+    denominators_string = ",".join([str(d) for d in denominators])
+    text_elem.text = f'n = [{numerators_string}];\n d = [{denominators_string}];'
+
+    answers_elem = ET.SubElement(question, 'answers')
+    partindex_elem = ET.SubElement(answers_elem, 'partindex')
+    ET.SubElement(partindex_elem, 'text').text = '0'
+    placeholder_elem = ET.SubElement(answers_elem, 'placeholder')
+    ET.SubElement(placeholder_elem, 'text').text = '#A'
+
+    answermark_elem = ET.SubElement(answers_elem, 'answermark')
+    ET.SubElement(answermark_elem, 'text').text = '2' if shortable else '1'
+
+    answer_elem = ET.SubElement(answers_elem, 'answer')
+    answer_text = '[resnum, cd, sresnum, sresden]' if shortable else '[resnum, cd]'
+    ET.SubElement(answer_elem, 'text').text = answer_text
+
+    vars1_elem = ET.SubElement(answers_elem, 'vars1')
+    vars1_elem_text = f"<![CDATA[resnum = {result_numerator}; cd = {common_denominator}; sresnum = {shortened_numerator}; sresden = {shortened_denominator};]]>"
+    ET.SubElement(vars1_elem, 'text').text = vars1_elem_text
+
+    vars2_elem = ET.SubElement(answers_elem, 'vars2')
+    vars2_elem_text = "<![CDATA[ ga = _0 == resnum && _1 == cd; gb = (_0 / _1) == (resnum / cd); ]]>"
+    ET.SubElement(vars2_elem, 'text').text = vars2_elem_text
+
+    correctness_elem = ET.SubElement(answers_elem, 'correctness')
+    ET.SubElement(correctness_elem, 'text').text = '0.5*ga + 0.5*gb'
+
+    feedback_elem = ET.SubElement(answers_elem, 'feedback', attrib={'format': 'html'})
+    feedback_text = '''<![CDATA[ <h4>Lösungshinweis</h4>
+                       <p>Die korrekte Lösung ist:</p>
+                       <p>\\(\\displaystyle''' + f"{result_numerator}/{common_denominator}" + '''\\)</p> ]]>'''
+    ET.SubElement(feedback_elem, 'text').text = feedback_text
+
+    return question
+
+def generate_questions(num_questions):
+    questions = []
+    for i in range(num_questions):
+        questions.append(create_formula_question(i))
+    return questions
+
+def create_quiz(questions):
+    quiz = ET.Element('quiz')
+    for q in questions:
+        quiz.append(q)
+    return quiz
+
+def save_to_file(xml_element, filename):
+    tree = ET.ElementTree(xml_element)
+    ET.indent(tree, space="\t", level=0)
+    with open(filename, 'wb') as f:
+        tree.write(f, encoding='utf_8', xml_declaration=True)
+    return 0
+
+def replace_vars2(xml_file):
+    with open(xml_file, 'r') as f:
+        text = f.read()
+    text = text.replace("&amp;", "&")
+    text = text.replace("&lt;", "<")
+    text = text.replace("&gt;", ">")
+    with open(xml_file, 'w') as f:
+        f.write(text)
+    print("Ersetzungen abgeschlossen.")
+
+if __name__ == "__main__":
+    questions = generate_questions(NUM_QUESTIONS)
+    quiz = create_quiz(questions)
+    save_to_file(quiz, FILENAME)
+    replace_vars2(FILENAME)
+    print("Moodle-XMLDatei erfolgreich erstellt.")