[ x^4 + 45*x^2 + 121, \ x^4 - x^3 - 8*x^2 + 46*x + 173, \ x^4 - x^3 - 37*x^2 - 174*x + 997, \ x^4 - 2*x^3 - 32*x^2 + 33*x - 113 ]