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A= 6 - 4 ( 3x-8)
= 6 - 12x + 32
= 26 - 12x

B= -3y + 3(5y+6) + 2y
= - 3y + 15y + 18 + 2y
= 14 y + 18

C = -2x -7 (3x +5 )+ 1
= -2x - 21x - 35 + 1
= -23x - 34

D= -3 (y+4) - 2(4-2y)
= -3y - 12 - 8 + 4y
= y - 20