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b) - [ -x-5-2x+2] -x +2 = x+5 +2x -2 - x +2 = 2x + 5
c) - [ x-3 -6x +2] = x+3 +6x -2 = 7x+1
d) -6x - 5 - 4x -8 + 2x -1 = -8x - 4
e) - [ 9x +3 +2x] - [6x - 4x - 1 ] = 9x - 3 - 2x -6x +4x +1= 5x - 2
f) - [ 2x - 3 -9x - 8] + 4x + 1 = -2x +3 +9x +8 +4x +1= 11x + 12
g) -10x -8 -6x + 9 -2x - 7 = -18x - 6