Answer:
2, 4, and 6.
Step-by-step explanation:
Why this is, is all you have to do is times the three to the other two numbers. This gives you 6^15 * 6^(-12). That is number 2. Times together will give you 216. That is number 4. And when you minus the exponents from each other, it will give you 6^3. That is number 6.
