32乘(-2)的2n次方乘(-2)乘(-2)的2n+1次方
=2的5次方X2的2n次方X(-2)X(-2)的2n+1次方
=2的(5+2n+1+2n+1)次方
=2的(4n+6)次方
=4的(2n+3)次方