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.
彩4彩票（网址:qmh8.com）彩4彩票_彩4彩票_彩4彩票_7xV83x7Sx
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
