def METHOD_NAME(self):
    t1 = (self.el1 * self.el2) + (self.el1 * self.el2)
    t2 = (self.el1 * self.el2) + (self.el1 * self.el3)
    try:
        self.assertEqual(t1, t2)
    except AssertionError as e:
        self.assertEqual(str(e), "'data2' != 'data3'")