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.
2^12 - (2^7 + 2^8 - 2^3)
2^12 - (2^7 + 2^8 - 2^3)
Natural Language
Math Input
Extended Keyboard