(-2a)^6-(-3a^3)^2+[-(2a)^2]^3
=-64a^6-9a^6-8a^6
=-81a^6好像错了，和答案不一样啊，答案是-9a^6(-2a)^6-(-3a^3)^2+[-(2a)^2]^3=64a^6-9a^6-64a^6=-9a^6e 刚才看错了