def compare_chemical_expression(s1, s2, ignore_state=False):
 return (divide_chemical_expression(s1, s2, ignore_state) == 1)

def compare_chemical_expression ( s1 , s2 , ignore_state = False ) : return ( divide_chemical_expression ( s1 , s2 , ignore_state ) == 1 )
it does comparison between two expressions .