5) \(\dfrac{6^{12}\cdot(6^3)^5}{(6^5)^4\cdot6^4}\)

\((6^3)^5=6^{15}\), \((6^5)^4=6^{20}\).

\(\dfrac{6^{12}\cdot6^{15}}{6^{20}\cdot6^4}=6^{12+15-20-4}=6^3=216\).

Ответ: 216