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.
博狗1669网址（网址:qmh8.com）博狗1669网址_博狗1669网址_博狗1669网址_博狗1669网址_博狗1669网址博狗1669网址_博狗1669网址_博狗1669网址_XA2EXFaua
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
