Simplify: 5x2−[2x−(x2−4x)]+105x^2 - [2x - (x^2 - 4x)] + 105x2−[2x−(x2−4x)]+10.
4x2+6x+104x^2 + 6x + 104x2+6x+10
6x2−6x+106x^2 - 6x + 106x2−6x+10
4x2−6x+104x^2 - 6x + 104x2−6x+10
6x2+6x+106x^2 + 6x + 106x2+6x+10