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.
威尼斯娱乐手机正式版极速版（网址:QY81.COM）威尼斯娱乐手机正式版极速版_威尼斯娱乐手机正式版极速版_威尼斯娱乐手机正式版极速版_c2dS2JJSS
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
