22m-1×16×8m-1+(-4m)×8m(m为正整数).

问题描述:

22m-1×16×8m-1+(-4m)×8m(m为正整数).

22m-1×16×8m-1+(-4m)×8m
=24×22m-1×23m-3+(-22m)×23m
=24+2m-1+3m-3-25m
=25m-25m
=0.