[ x^4 - 2*x^3 + 2*x^2 - x + 2, \ x^4 - x^3 - 3*x^2 - 2*x + 4, \ x^4 - x^3 + 4*x^2 - 20*x + 23, \ x^4 - 11*x^2 + 81, \ x^4 - x^3 + 5*x^2 - 6*x + 7, \ x^4 - 2*x^3 + 16*x^2 - 15*x - 9, \ x^4 + 29*x^2 + 261, \ x^4 - x^3 - 54*x^2 + 154*x - 35 ]