Add the polynomials: (x4−2x3+1)(x^4 - 2x^3 + 1)(x4−2x3+1) and (−x4+2x3+x−1)(-x^4 + 2x^3 + x - 1)(−x4+2x3+x−1).
xxx
x+2x + 2x+2
−4x3+2-4x^3 + 2−4x3+2
2x4+22x^4 + 22x4+2