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181 Calculaţi: a) 53: [25- (7.27: 14 -7°): 3²]; c) [112+ (92-5-7³:35):2³]:5²; b) 6² [4²-(5-35: 15-5°): 2³]; d) 34: [27-(4-55:20-5³):2²].
dau coroana ​