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.
8050官网（网址:EDF6.COM）8050官网_8050官网_8050官网_K8bD8zVW
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
