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4 (x+1) - 2 (x+3) = 4x+4-2x-6=2x-2
3 (2x-1) - (4x+5) =6x-3 -4x -5=2x-8
6x - (2x+3) - 3 (x+4) =6x-2x-3-3x-4=x-7
2x - 3(x-2) - 3(5x-1) =2x-3x+6-15x+3=-16x+9
(2x+1) (x+3) + 4(x+1) =2x²+6x+x+3+4x+4=2x²+11x+7
(3-x) (x+1) - 2(3x-1) =3x+3-x²-x-6x+2=-x²-4x+5