Expand: (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−xx^3 - xx3−x
x3+x2−1x^3 + x^2 - 1x3+x2−1