Simplify: 3x2−(x2−4)+2(x2+1)3x^2 - (x^2 - 4) + 2(x^2 + 1)3x2−(x2−4)+2(x2+1).
4x2+64x^2 + 64x2+6
4x2+24x^2 + 24x2+2
2x2+62x^2 + 62x2+6
4x2−24x^2 - 24x2−2