(-3a^3)^2*a^3+(-a^2)*a^7-(5a^3)^3等于多少?

问题描述:

(-3a^3)^2*a^3+(-a^2)*a^7-(5a^3)^3等于多少?

(-3a^3)^2*a^3+(-a^2)*a^7-(5a^3)^3
=9a^6*a^3-a^9-125a^9
=9a^9-a^9-125a^9
=-117a^9