Answer:
The first option
Step-by-step explanation:
Order of operations says that you raise everything in the parentheses to the third power as the 1st step.
2m^5^3 = 8m^5*3 = 8m^15
n^4^3 = n^4*3 = n^12
They are multiplied in the original equation, so multiply those and you get 8m^15n^12
