Уровень 2. 2. Представьте в виде многочлена: a) 6m³.(4h²+5m)(5m-4h²); б) (8a³-3)(8a³+3).(-2a²); в) (3+mn²)(mn²-3).(9+m²n⁴);

a) $6m^3(4h^2+5m)(5m-4h^2) = 6m^3(25m^2 - 16h^4) = 150m^5 - 96m^3h^4$ б) $(8a^3-3)(8a^3+3)(-2a^2) = (64a^6 - 9)(-2a^2) = -128a^8 + 18a^2$ в) $(3+mn^2)(mn^2-3)(9+m^2n^4) = (m^2n^4 - 9)(m^2n^4+9) = m^4n^8 - 81$