[ x^4 - x^2 - 24*x - 28, \ x^4 - x^3 - 5*x^2 - 78*x + 236, \ x^4 - x^3 - 41*x^2 - 52*x + 113, \ x^4 - x^3 - 31*x^2 + 64*x + 613, \ x^4 + 55*x^2 + 36, \ x^4 - x^3 - 5*x^2 + 51*x - 495, \ x^4 - x^3 - 91*x^2 + 1255*x + 1397, \ x^4 - 2*x^3 - 20*x^2 + 21*x - 610 ]