The image shows an exponent problem: $(7^3)^3$.

To rewrite this expression using a single exponent, we can apply the Power of a Power Rule. This rule states:

$(a^m)^n = a^{m \cdot n}$

For the given problem, this means:

$(7^3)^3 = 7^{3 \cdot 3} = 7^9$

So, the answer is $7^9$.

Would you like more details or have any questions?

Here are some related questions for practice:

1. How would you simplify $(2^5)^4$?
2. What is the result of $(3^2)^6$ using the power rule?
3. Can you apply the power rule to $(x^3)^2$?
4. How do you simplify $(10^4)^5$?
5. What happens if the base is negative, e.g., $(-5^2)^3$?

Tip: When using the power of a power rule, always multiply the exponents, no matter what the base is.