Answer:
![21^(10)](https://img.qammunity.org/2021/formulas/mathematics/high-school/4cvsgg3gmigy21h7uwgfxgqy9wckw3thie.png)
Explanation:
First, multiply the 3 and the 7 together, and then "multiply" the exponents -8 and 3. (However, when "multiplying exponents, you're really just adding them together: -8 + 5)
(
)^2
Then, multiply the -5 and -2 together, giving you:
![21^(10)](https://img.qammunity.org/2021/formulas/mathematics/high-school/4cvsgg3gmigy21h7uwgfxgqy9wckw3thie.png)