Ответ:

  1. \(9^{2/5}\cdot27^{2/5}=243^{2/5}=9\);
  2. \(7^{2/3}\cdot49^{2/3}=343^{2/3}=49\);
  3. \(144^{3/4}:9^{2/3}=1728:9^{2/3}=64\cdot3^{5/3}\);
  4. \(150^{3/2}:6^{3/2}=(25)^{3/2}=125\).

Ответ: 9; 49; \(64\cdot3^{5/3}\); 125.