September 2021 1 9 Report
a)x(y-z)+3(z-y)       г)x(x-4)-5(4-x)
б)a(b-c)-b(c-b)       д)b(b-1)+(1-b)
в)m(n-1)+k(1-n)     е)2(p-2)+p(2-p)

a)2(x-y)+(x-y)^2              г)(x-y)+x(y-x)
б)(a+b)^2-(a+b)(a-b)      д)n(m-n)^2-(n-m)^3
в)(x-y)^2-y(y-x)^2           е)a(a-c)^2-c(a-c)(c-a) ( ^2 это во 2 степени*)
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