a= 5 + (2x + 3) = 5 + 2x + 3 = 8 + 2x
b = 5x - ( 3 - 4x) = 5x -3 +4x = 9x -3
c= (x-4)-6 = x - 4 - 6 = x -10
d = (4x + 2) + (-6 x - 2) = 4x + 2 -6x -2 = - 2x
e = - ( -3x - 1) + ( x - 3) = 3 x + 1 + x - 3 = 4x -2
f = 8x - (5x + 2) + ( 3-4x) = 8x -5x -2 +3 -4 x = -x + 1
