Ответ:

  1. \(\dfrac{\sqrt[3]{49\cdot112}}{\sqrt[3]{250}}=\sqrt[3]{\dfrac{2744}{125}}=\dfrac{14}{5}\).
  2. \(\sqrt[4]{\dfrac{54\cdot120}{5}}=\sqrt[4]{1296}=6\).
  3. \(\sqrt[4]{\dfrac{32}{2}}+\sqrt[6]{27^2}-\sqrt{\sqrt[3]{64}}=2+3-2=3\).
  4. \(\sqrt[3]{\dfrac{27}{8}}+\sqrt[4]{81}-4=\dfrac32+3-4=\dfrac12\).
  5. \(\sqrt[3]{(11-\sqrt{57})(11+\sqrt{57})}=\sqrt[3]{121-57}=\sqrt[3]{64}=4\).
  6. \(\sqrt[4]{(17-\sqrt{33})(17+\sqrt{33})}=\sqrt[4]{289-33}=\sqrt[4]{256}=4\).

Ответ: 1) \(\frac{14}{5}\); 2) \(6\); 3) \(3\); 4) \(\frac12\); 5) \(4\); 6) \(4\).