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.
十大体育平台（网址:QY81.COM）十大体育平台_十大体育平台_十大体育平台_十大体育平台_十大体育平台十大体育平台_十大体育平台_十大体育平台_k2e2E8Ak
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
