Don’t really understand what to do need help please

Step-by-step explanation:
You need to multiple 3 for 15 and gain for12 times.
Compare which one is greater .
Write the greatest answer.
Similarly you need to do same process to next question according to power.
Answer:
27 & 16
Step-by-step explanation:
Just take like in example one:
3^15 and 3^12
You do
15-12=3
Then- 3^3=27!!
For the second:
4^10-4^8
10-8=2
4^2=16
Hope that's easy to understand!