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.
(! A || B || ! C || D) && (A || ! B || C || ! D) == (A && B)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random