Ответ:

  1. \(\frac{3^2\cdot4^3\cdot12^2}{9^2\cdot6^3}=\frac{2^6\cdot3^6}{2^3\cdot3^7}=\frac{8}{3}\).
  2. \(\frac{5^2\cdot6^4\cdot12^2}{15^2\cdot9^3}=\frac{2^8\cdot3^6\cdot5^2}{3^2\cdot5^2\cdot3^6}=2^6=64\).
  3. \(\frac{12^2\cdot4^3\cdot6^2}{8^2\cdot18^3}=\frac{2^{10}\cdot3^4}{2^9\cdot3^6}=\frac{2}{9}\).
  4. \(\frac{(3^3)^3\cdot9^7\cdot2^2}{81^5\cdot2^3}=\frac{3^9\cdot3^{14}\cdot2^2}{3^{20}\cdot2^3}=\frac{3^3}{2}=\frac{27}{2}\).