x^4 - x^3 - 13*x^2 + 20*x - 28 x^4 - x^3 - 8*x^2 - 155*x + 575 x^4 - x^3 + 20*x^2 + 57*x + 360 x^4 + 87*x^2 + 100 x^4 - 2*x^3 - 32*x^2 + 33*x - 1520