2的2m-1次方乘以16乘以8的m-1次梁简迟方咐李+（-4的m次方）乘橡李以8的m次方
=2^2m-1*2^4*2^3m-3-2^2m*2^3m
=2^(2m-1+4+3m-3)-2^5m
=2^5m-2^5m
=0
2的2m-1次方乘以16乘以8的m-1次方+（-4的m次方）乘以8的m次方。（化简）
2的2m-1次方乘以16乘以8的m-1次梁简迟方咐李+（-4的m次方）乘橡李以8的m次方
=2^2m-1*2^4*2^3m-3-2^2m*2^3m
=2^(2m-1+4+3m-3)-2^5m
=2^5m-2^5m
=0