а) а(m+n)+(2m+2n) = a(m+n) + 2(m+n) = am + an + 2m + 2n = am + an + 2m + 2n
б) (3x+3y)-(ax+ay) = 3x + 3y - ax - ay
в) (ma-mb) + (a-b) = ma - mb + a - b
г) (ap-aq)-(bp-bq) = ap - aq - bp + bq
а) а(m+n)+(2m+2n) = a(m+n) + 2(m+n) = am + an + 2m + 2n = am + an + 2m + 2n
б) (3x+3y)-(ax+ay) = 3x + 3y - ax - ay
в) (ma-mb) + (a-b) = ma - mb + a - b
г) (ap-aq)-(bp-bq) = ap - aq - bp + bq