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.
welcome皇冠地址（网址:EDF6.COM）welcome皇冠地址_welcome皇冠地址_welcome皇冠地址_welcome皇冠地址_welcome皇冠地址welcome皇冠地址_welcome皇冠地址_welcome皇冠地址_cOO1GkOq
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
