This is the last one i swear which is equal??

Answer:
[tex] ({7}^{3} ) ^{ - 2} \\ = {7}^{ - 6} = \frac{1}{ {7}^{6} } = \frac{1}{7 \times 7 \times 7 \times 7 \times 7 \times 7} [/tex]First answer is correct....
Answer:
first one.
Step-by-step explanation:
[tex]((7^{3} )^{-2} )[/tex] = [tex]7^{-6}[/tex]