=（-1）2n+2次方*2的2n+2次方*4的n次方* [（2*4）的n次方]
=1* [2的2*(n+1)方]*4的n次方*4的n次方*2的n次方
=4的（n+1）次方*4的n次方*4的n次方* [4的（1/2）次方]的n次方
=4的（3n+1）次方* [4的（1/2）n次方]
=4的[（7/2）n+1]次方