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b) -4(x+y)=-4x-4y
c) -5(-x+1)=5x-5
d) -3a(⅓-a)=-a+3a²
b)-4x+(-4y)
c)5x+(-5)
d)-a+3a²
b) -4(x+y)=-4x-4y
c) -5(-x+1)=5x-5
d) -a+3a^2 a^2 a do potęgi 2