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.
sb体育网站（网址:QY81.COM）sb体育网站_sb体育网站_sb体育网站_sb体育网站_sb体育网站sb体育网站_sb体育网站_sb体育网站_c9zk1k1h9
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
