5) 6¹² ⋅ (6³ )⁵ / (6⁵)⁴ ⋅ 6⁴;

5) $$ \frac{6^{12} \cdot (6^3)^5}{(6^5)^4 \cdot 6^4} = \frac{6^{12} \cdot 6^{15}}{6^{20} \cdot 6^4} = \frac{6^{27}}{6^{24}} = 6^{27-24} = 6^3 = 216 $$

Ответ: 216