[ x^4 - x^3 + 2*x^2 + 4*x + 3, \ x^4 - x^3 - 7*x^2 + 11*x + 3, \ x^4 + 23*x^2 + 324, \ x^4 - x^3 - 193*x^2 - 191*x + 2733 ]