Ответ:

  1. \(\sqrt[7]{a^3}=a^{3/7}\).
  2. \(\sqrt[14]{m^{-9}}=m^{-9/14}\).
  3. \(\sqrt[6]{5a^5}=(5a^5)^{1/6}\).
  4. \(\sqrt[4]{x+y}=(x+y)^{1/4}\).