x^4 - x^3 - 6*x^2 + 19*x - 20 x^4 - 55*x^2 - 122*x + 76 x^4 + 79*x^2 + 576 x^4 - x^3 - 79*x^2 + 500*x + 4636 x^4 - 2*x^3 - 189*x^2 + 190*x - 6723