Question

(3a的平方)的3次方-6a的3次方(2a的3次方+3a的平方+a)

Answer 1

(3a^2)^3-6a^3(2a^3+3a^2+a)

=27a^6-12a^6-18a^5-6a^4

=15a^6-18a^5-6a^4