I have a task to make an anti-plagiarism of formulas. It is necessary for it to highlight similar places in two formulas (example in the photo). But there is a problem, after I found these similar places I cannot highlight them in the original formulas, since their entry in Latex is slightly different. Help please!

Example

Code:

import sympy
from sympy.parsing.latex import parse_latex



def flatten(nested_list) -> list:
    result = []
    for item in nested_list:
        if isinstance(item, list):
            result.extend(flatten(item))
        else:
            result.append(item)
    return result


def expression_tree(expression, depth=0, max_depth=1):
    if max_depth is not None and depth > max_depth or expression.is_Atom:
        return str(expression)

    tree_list = []
    for arg in expression.args:
        tree_list.append(expression_tree(arg, depth + 1, max_depth))

    return tree_list

def rec_check_expressions(expr, expressions):
    for i in expressions:
        if sympy.parse_expr(i).equals(expr):
            return [sympy.sympify(i), sympy.sympify(expr)]
    if type(expr) is str:
        return []
    return [rec_check_expressions(a, expressions) for a in flatten(expression_tree(expr))]


def get_same_parts(expr1, expr2, min_len):
    depth = 1
    all_subtrees1 = []
    _ = []
    while 1:
        subtrees1 = flatten(expression_tree(expr1, max_depth=depth))
        if subtrees1 == _:
            break

        all_subtrees1.append(subtrees1)
        all_subtrees1 = flatten(all_subtrees1)

        _ = subtrees1
        depth += 1

    all_subtrees1 = [a for a in set(all_subtrees1) if len(a) > min_len]

    return rec_check_expressions(expr2, all_subtrees1)


exp1 = parse_latex(r"sqrt{(x^2-12x-325)}-cos(12pi-x^2)")
exp2 = parse_latex(r"|(x-25)(x+13)|+sin(-x*x+6pi+5pi+pi)")
parts = get_same_parts(exp1, exp2, 4)

exp1 = sympy.latex(sympy.sympify(exp1)).replace(" ", "")
exp2 = sympy.latex(sympy.sympify(exp2)).replace(" ", "")


for i, j in parts:
    a = sympy.latex(i).replace(" ", "")
    b = sympy.latex(j).replace(" ", "")
    exp1 = exp1.replace(a, "colorbox{#88E788}{$" + a + "}$")
    exp2 = exp2.replace(b, "colorbox{#88E788}{$" + b + "}$")


print(exp1)
print(exp2)

Help please!!!!!!!!!!