[ x^4 - x^3 + 5*x^2 - 7*x + 49, \ x^4 + 3*x^2 + 400, \ x^4 - 2*x^3 + 3*x^2 + 41*x + 173, \ x^4 - x^3 - 402*x^2 + 400*x + 37493 ]