Ответ:

  1. \(77 - (23 + 4) = 77 - 27 = 50\).
  2. \(90 - (34 + 16) = 90 - 50 = 40\).
  3. \((59 - 29) + 13 = 30 + 13 = 43\).
  4. \(25 + (38 - 16) = 25 + 22 = 47\).
  5. \(42 + (53 - 12) = 42 + 41 = 83\).
  6. \(27 + (65 - 59) = 27 + 6 = 33\).

Ответ: 50; 40; 43; 47; 83; 33.