x4+12x2+42x^{4}+12 x^{2}+42x4+12x2+42
2x2+72 x^{2}+72x2+7
4x2−20x+314 x^{2}-20 x+314x2−20x+31
4x2−20x+304 x^{2}-20 x+304x2−20x+30