I'm going to assume that you accidentally missed a set of parentheses and that the expression is 
Raise 2,
, and 
to the third power:
When a variable raised to a power is raised to another power, the exponents are multiplied:
Negative powers are the positive power in the denominator:
Therefore, the answer is the second option.
Raise 2,
When a variable raised to a power is raised to another power, the exponents are multiplied:
Negative powers are the positive power in the denominator:
Therefore, the answer is the second option.