Simplify: 3−[2x−(4x+1)]3 - [2x - (4x + 1)]3−[2x−(4x+1)].
2x+42x + 42x+4
−2x+4-2x + 4−2x+4
2x−42x - 42x−4
−2x−4-2x - 4−2x−4