x^4 - x^3 - 13*x^2 + 20*x - 28 x^4 + 93*x^2 + 49 x^4 - x^3 - 120*x^2 + 234*x + 5643 x^4 - 2*x^3 - 266*x^2 - 375*x - 29659 x^4 - 2*x^3 - 266*x^2 + 267*x - 1197 x^4 - x^3 + 94*x^2 + 341*x - 9979