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.
乐博百万(网址:EDF6.COM)乐博百万_乐博百万_乐博百万_T1TI2K12A
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random