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.
四喜娱乐网站（网址:QY81.COM）四喜娱乐网站_四喜娱乐网站_四喜娱乐网站_四喜娱乐网站_四喜娱乐网站四喜娱乐网站_四喜娱乐网站_四喜娱乐网站_W8B81c484
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
