def test_difference_of_squares_5(self): self.assertEqual(difference(5), 170)
def test_difference_of_squares_100(self): self.assertEqual(difference(100), 25164150)
def test_difference_100(self): self.assertEqual(25164150, difference(100))
def test_difference_of_squares_1(self): self.assertEqual(difference(1), 0)
def test_difference_5(self): self.assertEqual(170, difference(5))
def test_difference_1e6(self): self.assertEqual(250000166666416666500000, difference(10**6))