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.
华南官网（网址:EDF6.COM）华南官网_华南官网_华南官网_华南官网_华南官网华南官网_华南官网_华南官网_91q9IF9q6
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
