(4-a²)(a-2)+(a²+6a+9)(2a+6)+2
=(a-2）²(a+2)+(a+3）²2*（a+3)+2
=(a-2）²(a+2)+2(a+3）³+2
=(1-2）²(1+2)+2(1+3）³+2
=3+2*4³+2
=133