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.
玩博网站（网址:QY81.COM）玩博网站_玩博网站_玩博网站_玩博网站_玩博网站玩博网站_玩博网站_玩博网站_pdcBpqj1c
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
