Answer:
8x⁶y⁹z⁻⁶
Step-by-step explanation:
You have the problem (2x²y³z⁻²)³.
Since there is nothing more you can do within the parentheses, the next thing to do is distribute the exponent. When distributing an exponent to a number that already has an exponent, you have to multiply the exponents.
This gives you 8x⁶y⁹z⁻⁶.