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a) (125: 5 - 140:2): (-9) + (-324): (-18);B) [13 (-15) - (22-9.3)] - (-5) - 900; • c) 50+2 (40-8. [30 +3 (10-45:3)]}; d) 12+ {[(82-102): 6 - (7.15 - 50-3)] · 3}: (-13); e)[(-2)-2-(-5)²+3 (10:29)] 5; f) [3 (-3)² (-3) 10:312-210.216: 223]: 5; 9 - 8) 819: [415. (-2)20 + (28: 2³)10] : [(-2º) −2 − 2² −2³ − 1]; h) (-5)100. [1415 1134​