[ x^4 - x^3 + 5*x^2 - 7*x + 49, \ x^4 - x^3 - 4*x^2 + 16*x - 3, \ x^4 - 2*x^3 + 2*x^2 - x + 21, \ x^4 - 2*x^3 - 17*x^2 + 18*x - 1732, \ x^4 + 23*x^2 + 900, \ x^4 - 2*x^3 + 20*x^2 - 19*x + 7000, \ x^4 - x^3 - 772*x^2 + 770*x + 141463 ]