[ x^4 - x^3 - 6*x^2 + x + 1, \ x^4 - 2*x^3 + 9*x^2 - 8*x - 1, \ x^4 - x^3 + 10*x^2 + x + 1, \ x^4 - 2*x^3 - 7*x^2 + 8*x - 52, \ x^4 + 15*x^2 + 256, \ x^4 - x^3 + 198*x^2 + x + 9589, \ x^4 - 17*x^2 + 272 ]