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.
(-7-2z^3+4y) - (3z^3+12-6y)
(-7-2z^3+4y) - (3z^3+12-6y)
Natural Language
Math Input
Extended Keyboard