2(a-b)+a(a-b)= 2(x-y)-a(x-y)= (m+1)-m(m+1)= 7(x+y)-a(x+y)= 2(a-b)+c(b-a)= 4(m+n)+(m+n)= 2a(b-3)-5c(3-b)=

миша1128    2   19.03.2019 23:40    0