To rewrite the expression \((6^3)^5\) using a single exponent, you can use the power of a power property, which states that \((a^m)^n = a^{m \cdot n}\).
Applying this property:
\[ (6^3)^5 = 6^{3 \cdot 5} = 6^{15} \]
So, \((6^3)^5\) can be rewritten as \(6^{15}\).