3(x^3)^2*x^3-(3x^3)^3+(5x)^2*x^7等于多少?

问题描述:

3(x^3)^2*x^3-(3x^3)^3+(5x)^2*x^7等于多少?
还有一道(-2a)^6-(-3a^3)^2-[-(-2a)^2]^3等于多少,

(1)
3(x^3)^2*x^3-(3x^3)^3+(5x)^2*x^7
=3x^9-27x^9+25x^9
=x^9
(2)
(-2a)^6-(-3a^3)^2-[-(-2a)^2]^3
=64a^6-9a^6+64a^6
=119a^6