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.
通博的官网（网址:EDF6.COM）通博的官网_通博的官网_通博的官网_通博的官网_通博的官网通博的官网_通博的官网_通博的官网_W21WgA2gA
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
