2^100-2^96
=2^96(2^4-1)
=79228162514264337593543950336(16-1)
=79228162514264337593543950336*15
=1188422437713965063903159255040
也可直接计算。得到的结果是一样的。
2^100-2^96
=1267650600228229401496703205376-79228162514264337593543950336
=1188422437713965063903159255040