Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
五发平台代理（网址:QY81.COM）五发平台代理_五发平台代理_五发平台代理_五发平台代理_五发平台代理五发平台代理_五发平台代理_五发平台代理_M2ww2SSwM
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
