Multiply: (x−1)(x2+x+1)(x - 1)(x^2 + x + 1)(x−1)(x2+x+1).
x3+1x^3 + 1x3+1
x3−1x^3 - 1x3−1
x3+2x2+2x+1x^3 + 2x^2 + 2x + 1x3+2x2+2x+1
x3−2x2+x−1x^3 - 2x^2 + x - 1x3−2x2+x−1