Без 75/100 перевод и пость спасибо
1)
(a+2)(a²-2a+4)=a³-2³=a³-8
2)
(3+m)(9-3m+m²=3³+m³=27+m³
5)
(1+a³)(1-a³+a^6=1³+a³=1+a³
8)
(64+8z³+z^6)(8-z³)=8³-z³=512-z³
M/(m^2-4):((4+m^2)/(2+m) - m) = m/((m-2)(m+2)):(4+m^2-m(m+2))/(m+2) =
= m/((m-2)(m+2))*(m+2)/(4+m^2-m^2-2m) = m/(m-2)*1/(4-2m) = -m/(2(m-2)^2)