Perform the operations. negative left bracket 3 z squared plus 3 z minus left parenthesis 2 z squared minus 8 z right parenthesis right bracket plus left bracket left parenthesis 9 z squared minus left bracket 5 z minus z squared right bracket right parenthesis plus 5 z squared right bracket Question content area bottom Part 1 negative left bracket 3 z squared plus 3 z minus left parenthesis 2 z squared minus 8 z right parenthesis right bracket plus left bracket left parenthesis 9 z squared minus left bracket 5 z minus z squared right bracket right parenthesis plus 5 z squared right bracketequals enter your response here (Simplify your answer.)