x^4 - x^3 - 3*x^2 + 2*x + 4 x^4 - x^3 - 4*x^2 - 5*x + 25 x^4 + 3*x^2 - 12 x^4 - x^3 + 3*x^2 + x + 20 x^4 - 6*x^2 - 11*x - 3 x^4 - x^3 + 6*x^2 + 8*x - 5