Multiply: (x+1)(x−1)(x2+1)(x + 1)(x - 1)(x^2 + 1)(x+1)(x−1)(x2+1).
x4−1x^4 - 1x4−1
x4+1x^4 + 1x4+1
x4−x2+1x^4 - x^2 + 1x4−x2+1
x3−1x^3 - 1x3−1