What is the value of the expression below when $$ z=2 $$ ? $$ 8 z^{2}-8 z+2 $$

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Substitute $$ z=2 $$ into the expression $$ 8z^{2}-8z+2 $$.
Evaluate the expression by following steps:
- step0: Evaluate:
  $$8z^{2}-8z+2$$
- step1: Substitute:
  $$8	imes 2^{2}-8	imes 2+2$$
- step2: Multiply the terms:
  $$2^{5}-8	imes 2+2$$
- step3: Multiply the numbers:
  $$2^{5}-16+2$$
- step4: Evaluate the power:
  $$32-16+2$$
- step5: Calculate:
  $$18$$
When $$ z=2 $$, the expression $$ 8z^{2}-8z+2 $$ equals 18.

What is the value of the expression below when ?

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