[ x^4 - x^3 - 44*x^2 + 244*x + 1600, \ x^4 + 75*x^2 + 4, \ x^4 - 2*x^3 + 35*x^2 + 37*x + 360, \ x^4 - 2*x^3 - 105*x^2 + 106*x - 2800 ]