а)a(b-c)+y(b-c)
б)c(x+y)-3(x+y)
в)a^2(a^3+1)-4(a^3-1)
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а)a(b-c)+y(b-c)
б)c(x+y)-3(x+y)
в)a^2(a^3+1)-4(a^3-1)