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b) 3(x+2y -6)= 3x+6y-18
c) -2(x+4-y+z)=-2x-8+2y-2z
d) x(2y-54)=2xy-54x
e) x(2x²-x+7)=2x³-x²+7x
f) a(b+a -ab) =ab+a²-a²b
b) 3(x+2y -6)= 3x+6y-18
c) -2(x+4-y+z)= -2x - 8+2y-2z
d) x(2y-54)= 2xy -54x
e) x(2x²-x+7)= 2x³-x²+7x
f) a(b+a -ab) =ab + a²-a²b