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.
贝博bb登录入口（网址:QY81.COM）贝博bb登录入口_贝博bb登录入口_贝博bb登录入口_2zys9z9a9
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
