It seems that you have uploaded two images. Both images display a question asking to simplify the expression $6^{4^2}$.

Let's begin simplifying it:

1. The expression is $6^{4^2}$.
2. First, solve the exponent $4^2$, which is $16$.
3. Now, the expression becomes $6^{16}$.

So the simplified expression is $6^{16}$.

Would you like further details on how to work with exponential expressions, or do you have additional questions?

Here are five related questions:

1. How do you simplify an expression with multiple exponents, such as $6^{(2^3)}$?
2. What is the rule for multiplying numbers with exponents?
3. How do you handle negative exponents?
4. Can you calculate $6^{16}$ and give the numerical value?
5. How do exponents apply to algebraic expressions?

Tip: When simplifying exponents, always start by solving the innermost exponent first, and then simplify the rest.