human
Solve the following python programming problem given the following code:
def _minpoly_groebner(ex, x, cls) : 
    '
    Computes the minimal polynomial of an algebraic number
    using Groebner bases

    Examples
    ========

    >>> from sympy import minimal_polynomial, sqrt, Rational
    >>> from sympy.abc import x
    >>> minimal_polynomial(sqrt(2) + 3*Rational(1, 3), x, compose=False)
    x**2 - 2*x - 1

    ' 
    from sympy.polys.polytools import degree 
    from sympy.core.function import expand_multinomial 
    generator = numbered_symbols ('a', cls = Dummy) 
    (mapping, symbols, replace) = ({ 
        
}, { 
        
}, []) 
    def update_mapping(ex, exp, base = None) : 
        a = next (generator) 
        symbols [ex] = a 
        if (base is not None) : 
            mapping [ex] = ((a ** exp) + base) 
else : 
            mapping [ex] = exp.as_expr (a) 
return a 
def bottom_up_scan(ex) : 
        if ex.is_Atom : 
            if (ex is S.ImaginaryUnit) : 
                if (ex not in mapping) : 
                    return update_mapping (ex, 2, 1) 
else : 
                    return symbols [ex] 
else : 
                if ex.is_Rational : 
                    return ex 
else : 
            if ex.is_Add : 
                return Add (* [bottom_up_scan (g) for g in ex.args]) 
else : 
                if ex.is_Mul : 
                    return Mul (* [bottom_up_scan (g) for g in ex.args]) 
else : 
                    if ex.is_Pow : 
                        if ex.exp.is_Rational : 
                            if ((ex.exp < 0) and ex.base.is_Add) : 
                                (coeff, terms) = ex.base.as_coeff_add () 
                                (elt, _) = primitive_element (terms, polys = True) 
                                alg = (ex.base - coeff) 
                                inverse = invert ((elt.gen + coeff), elt).as_expr () 
                                base = inverse.subs (elt.gen, alg).expand () 
                                if (ex.exp == (- 1)) : 
                                    return bottom_up_scan (base) 
else : 
                   ...

    
    

    Fix the buggy line: result = ((ex.q * simpler_inverse) - ex.p)
assistant
#Here is Python code to fix the buggy line: result = ((ex.

result = ((ex.q * x) - ex.p)