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.
im体育竞技(网址:QY81.COM)im体育竞技_im体育竞技_im体育竞技_P02j20D0D
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random