2x2−6x−12 x^{2}-6 x-12x2−6x−1
4x2+6x−14 x^{2}+6 x-14x2+6x−1
2x2+6x−12 x^{2}+6 x-12x2+6x−1
3x2−6x−13 x^{2}-6 x-13x2−6x−1