(6^3)^2

6^6.

To simplify this expression, we first need to remember the rule of exponents that states: when we raise a power to another power, we multiply the exponents.

In this case, we are raising 6 to the power of 3, and then raising that result to the power of 2. So, we have:

(6^3)^2 = 6^(3*2) = 6^6

Therefore, (6^3)^2 simplifies to 6 raised to the power of 6, or simply 46656.