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.
v无限娱乐吧（永久链接:SE8.TV）v无限娱乐吧_v无限娱乐吧_v无限娱乐吧_v无限娱乐吧_v无限娱乐吧v无限娱乐吧_v无限娱乐吧_v无限娱乐吧_f02a2UU0
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
