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.
18luck网站（网址:EDF6.COM）18luck网站_18luck网站_18luck网站_18luck网站_18luck网站18luck网站_18luck网站_18luck网站_25y5NxF
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
