Yes, you can use the power of exponents to simplify the expression \( (73^4)^5 \). According to the power of a power property of exponents, when you raise a power to another power, you multiply the exponents.
So, for \( (a^m)^n \), it simplifies to \( a^{m \cdot n} \).
In your case:
\[ (73^4)^5 = 73^{4 \cdot 5} = 73^{20} \]
Thus, the simplified expression is \( 73^{20} \).