Ответ:

  1. \(7\sqrt2-2\sqrt{50}+2\sqrt{32}=7\sqrt2-2\cdot5\sqrt2+2\cdot4\sqrt2=(7-10+8)\sqrt2=5\sqrt2\).
  2. \(2\sqrt3+2\sqrt{75}-2\sqrt{48}=2\sqrt3+2\cdot5\sqrt3-2\cdot4\sqrt3=(2+10-8)\sqrt3=4\sqrt3\).
  3. \(2\sqrt{48}+2\sqrt3-2\sqrt{75}=2\cdot4\sqrt3+2\sqrt3-2\cdot5\sqrt3=(8+2-10)\sqrt3=0\).
  4. \(3\sqrt{32}-5\sqrt2+2\sqrt{72}=3\cdot4\sqrt2-5\sqrt2+2\cdot6\sqrt2=(12-5+12)\sqrt2=19\sqrt2\).

Ответ: 1) \(5\sqrt2\); 2) \(4\sqrt3\); 3) \(0\); 4) \(19\sqrt2\).