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.
凤凰娱乐app（网址:QY81.COM）凤凰娱乐app_凤凰娱乐app_凤凰娱乐app_凤凰娱乐app_凤凰娱乐app凤凰娱乐app_凤凰娱乐app_凤凰娱乐app_6hD6tDty1
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
