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.
-10 - 9 + ((8 + 7) * 6 - 5) * 4 * (3 + 2 + 1)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random