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.
爱发168官网app（网址:QY81.COM）爱发168官网app_爱发168官网app_爱发168官网app_爱发168官网app_爱发168官网app爱发168官网app_爱发168官网app_爱发168官网app_S1XimS1v
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
