Ответ:Решение:\( 31 + 44 = 75 \)\( 28 + 18 = 46 \)\( 40 - 19 = 21 \)\( 71 - (21 + 40) = 71 - 61 = 10 \)\( 58 + (35 - 35) = 58 + 0 = 58 \)\( 23 + (47 - 40) = 23 + 7 = 30 \)Ответ: 75, 46, 21, 10, 58, 30.