posted by Chris .
what is the goal? to simplify? if so it would be:
z^2 means z squared, z^3 z cubed, etc.
i assumed that the 4z3 at the beginning was four z cubed...
By the way in google type:
When you see list of results click on:
Expessions Simplifier and Solver-Algebra com
When page be open in rectacangle type your equation 4z3(3z-1)+7(3z-1)
and click option SOLVE OR SIMPLIFY
You will se solution step-by-step
On that site you can simplify any kind of equation.