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

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(-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等于多少?(-3a^3)^2*a^3+(-a^2)*a^7

(-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等于多少?

(-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

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