a) [7 (14-2-7): 2]²; b) (10² - 8²): 6:2 +12019; c) [17 (25-8-3) 12021-15] 23-2²-3; ● d) [(92-24.5): 1 +59: (5²)4] - 2²; e) {[(169: 13-2³): 5+ (7.2³-2-3): 5+2³]: 19 +53-2³-24-3; f) (332: 32 +22. 225-2019°) (37¹⁹​