Multiply: (x+6)(x−1)(x + 6)(x - 1)(x+6)(x−1).
x2+5x−6x^2 + 5x - 6x2+5x−6
x2−5x−6x^2 - 5x - 6x2−5x−6
x2+5x+6x^2 + 5x + 6x2+5x+6
x2−6x+6x^2 - 6x + 6x2−6x+6