pub fn univariate_gcd_modular(
p1: &Expression,
p2: &Expression,
var: &Symbol,
) -> Result<(Expression, Expression, Expression), PolynomialError>pub fn univariate_gcd_modular(
p1: &Expression,
p2: &Expression,
var: &Symbol,
) -> Result<(Expression, Expression, Expression), PolynomialError>