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.
电子游戏平台网址（网址:qmh8.com）电子游戏平台网址_电子游戏平台网址_电子游戏平台网址_O818RkW2H
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
