б) 4x - 4y + 7x - 7y = 11x - 11y
г) 2a - 3b + 3a = 2a - 3b + 3a = 5a - 3b
е) ax - ay - bx - by = ax - bx - ay - by = x(a - b) - y(a + b)
2ab(a + 2b) - 3ab(a - 4) = 2ab^2 + 4ab^2 - 3a^2b + 12ab = 6ab^2 - 3a^2b + 12ab
б) 4x - 4y + 7x - 7y = 11x - 11y
г) 2a - 3b + 3a = 2a - 3b + 3a = 5a - 3b
е) ax - ay - bx - by = ax - bx - ay - by = x(a - b) - y(a + b)
2ab(a + 2b) - 3ab(a - 4) = 2ab^2 + 4ab^2 - 3a^2b + 12ab = 6ab^2 - 3a^2b + 12ab