Ответ:Решение:\( 75 - (8 + 7) = 75 - 15 = 60 \)\( 60 + (9 + 9) = 60 + 18 = 78 \)\( 42 + (50 + 8) = 42 + 58 = 100 \)\( 38 - (23 + 7) = 38 - 30 = 8 \)Ответ: 60; 78; 100; 8.