Ответ:

  1. \(9^{2/5}\cdot27^{2/5}=(9\cdot27)^{2/5}=243^{2/5}=9\);
  2. \(7^{2/3}\cdot49^{2/3}=343^{2/3}=49\);
  3. \(144^{3/4}:9^{3/4}=16^{3/4}=8\);
  4. \(150^{3/2}:6^{3/2}=25^{3/2}=125\).