(1) (-2a的三次方)²+(a²)的3次方-2a×a的5次方
=4a^6+a^6-2a^6
=3a^6
即3a的6次方
(2)4(a+2)(a+1)-7(a+3)(a-3)+30(a-1)
=4(a²+3a+2)-7(a²-9)+30(a-1)
=4a²+12a+8-7a²+63+30a-30
=-3a²+42a+41
(1) (-2a的三次方)²+(a²)的3次方-2a×a的5次方
=4a^6+a^6-2a^6
=3a^6
即3a的6次方
(2)4(a+2)(a+1)-7(a+3)(a-3)+30(a-1)
=4(a²+3a+2)-7(a²-9)+30(a-1)
=4a²+12a+8-7a²+63+30a-30
=-3a²+42a+41