[ x^4 - x^3 - 6*x^2 + x + 1, \ x^4 - 2*x^3 - 7*x^2 - 9*x - 1, \ x^4 + 7*x^2 + 144, \ x^4 - x^3 + 130*x^2 + x + 4217, \ x^4 - x^3 + 12*x^2 + 60*x - 616 ]