2³. a) [7²+(2-54:10-3):2²]:2²; c) [(5.3³:15+24)-2²-5²]: 5²; 18 Calculati: b) [6+ (7.25: 14+2²):3²]:2³; 7 d) [(7-37: 63+7°): 2² +3³]:2
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