def test_normal(): assert normal(4*n+5, 2*(4*n+1)*(2*n+3), n)
def test_H12(): num = x**2 - 4 den = x**2 + 4 * x + 4 assert normal(num, den, x) == (x - 2, x + 2, 1)
def test_normal(): assert normal(4 * n + 5, 2 * (4 * n + 1) * (2 * n + 3), n)
def test_H12(): num = x**2 - 4 den = x**2 + 4*x + 4 assert normal(num, den, x) == (x-2, x+2, 1)