December 2018 1 18 Report
Wykonaj działania:
a) -5xy+3y(x-1)+(2x-1)(y+3)

b) 3y^2-2x(x+2y)-(x-y)(2x+y)

c) (a-1)(a+b-2)-9a^2


d) (a+2c)(a-c+2)-ac
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