Ответ:

  1. \(84 - (36 + 24) : 3 \cdot 2\)

    \(36 + 24 = 60\); \(60 : 3 = 20\); \(20 \cdot 2 = 40\); \(84 - 40 = 44\).

  2. \(187 - (87 - 40 - 17) \cdot 2\)

    \(87 - 40 = 47\); \(47 - 17 = 30\); \(30 \cdot 2 = 60\); \(187 - 60 = 127\).

  3. \((85 - 53) - (28 + 16) : 4\)

    \(85 - 53 = 32\); \(28 + 16 = 44\); \(44 : 4 = 11\); \(32 - 11 = 21\).

Ответ: 44; 127; 21.