[ x^4 - x^3 - 13*x^2 + 20*x - 28, \ x^4 - x^3 + 12*x^2 + 153*x + 779, \ x^4 + 69*x^2 + 361, \ x^4 - 2*x^3 + 17*x^2 - 16*x - 3253 ]