Simplify: (x2−5x+6)+(3x2+5x−4)(x^2 - 5x + 6) + (3x^2 + 5x - 4)(x2−5x+6)+(3x2+5x−4).
4x2+24x^2 + 24x2+2
4x2−10x+24x^2 - 10x + 24x2−10x+2
4x2+10x+24x^2 + 10x + 24x2+10x+2
3x2+23x^2 + 23x2+2