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