HELP ME.simplify{[4(z-4)+18]-[3(2z-2)+4]}

6{[4(z-4)+18]-[3(2z-2)+4]}
simplify your answer. can someone help me please I have no clue. thank you

Help please!

Simplify -4^2+9
-4^2+9= 12
is this correct? if not can you show me what the correct answer?
thank you