Ответ Автор - nKrynka a) m^2 - 2mn^(1/2) + n + m^2 + 2mn^(1/2) + n = 2m^2 + 2nб) m^(2/3) + 4m^(1/3)n^(1/2) + 4n - m^(2/3) + 4m^(1/3)n^(1/2) - 4n = 8m^(1/3)n^(1/2)в) m^(1/2) - nг) m^(3/2) + n^3