[ x^4 - x^3 + x^2 - x + 1, \ x^4 - 2*x^3 - 2*x^2 + x + 7, \ x^4 + 21*x^2 + 169, \ x^4 - x^3 + x^2 + 14*x + 16, \ x^4 - x^3 - 59*x^2 + 59*x + 661, \ x^4 - x^3 - 14*x^2 + 4*x + 61 ]