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Properties of exponents challenge (integer exponents)

Natalie tried to evaluate an expression step by step.
(4323)0=(83)0Step 1=80Step 2=0Step 3\begin{aligned} &\left( 4^{-3} \cdot 2^{-3} \right)^{0} \\\\ =&\left( 8^{-3}\right)^{0} &\green{\text{Step } 1} \\\\ =& 8^{0} &\blue{\text{Step } 2} \\\\ =&0&\purple{\text{Step } 3} \end{aligned}
Find Natalie's mistake.
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Choose 1 answer: