[ x^4 - x^3 - 36*x^2 - 91*x - 61, \ x^4 - 71*x^2 - 71*x + 1136, \ x^4 - 13*x^2 + 1764, \ x^4 - x^3 + 1710*x^2 + 6893*x + 130889 ]