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.
koko体育app官网（网址:QY81.COM）koko体育app官网_koko体育app官网_koko体育app官网_E7s1717EN
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
