Ответ:

  1. \(5\sqrt{11}\cdot2\sqrt2\cdot\sqrt{22}=10\sqrt{11\cdot2\cdot22}=10\sqrt{484}=220\).
  2. \(7\sqrt{15}\cdot2\sqrt2\cdot\sqrt{30}=14\sqrt{15\cdot2\cdot30}=14\sqrt{900}=420\).
  3. \(4\sqrt{17}\cdot5\sqrt2\cdot\sqrt{34}=20\sqrt{17\cdot2\cdot34}=20\sqrt{1156}=680\).
  4. \(4\sqrt5\cdot3\sqrt3\cdot\sqrt{15}=12\sqrt{5\cdot3\cdot15}=12\sqrt{225}=180\).
  5. \(10\sqrt7\cdot2\sqrt6\cdot\sqrt{42}=20\sqrt{7\cdot6\cdot42}=20\sqrt{1764}=840\).
  6. \(5\sqrt{13}\cdot2\sqrt3\cdot\sqrt{39}=10\sqrt{13\cdot3\cdot39}=10\sqrt{1521}=390\).

Ответ: 1) 220; 2) 420; 3) 680; 4) 180; 5) 840; 6) 390.