def test_solve_rational():
 assert (solve(((x - (y ** 3)) / ((y ** 2) * sqrt((1 - (y ** 2))))), x) == [(y ** 3)])

def test_solve_rational ( ) : assert ( solve ( ( ( x - ( y ** 3 ) ) / ( ( y ** 2 ) * sqrt ( ( 1 - ( y ** 2 ) ) ) ) ) , x ) == [ ( y ** 3 ) ] )
test solve for rational functions .