For this case we have the following expression:
(7m ^ 3n) ^ 2
By power properties we can rewrite the expression as:
((7 ^ 2) (m ^ (3 * 2)) (n ^ 2))
Then, simplifying we have:
(49 (m ^ 6) (n ^ 2))
Answer:
the correct simplification of the expression is:
(49 (m ^ 6) (n ^ 2))