13 Efectuați: a [(32):37-30-321-4:34 +2²; b (123+27 2² +267 : 227]: [123+2¹4:25 +(25)]; c(25')': (4²+3²)¹1-(02010 +12012 +2013°)²; d [3³.3+245:242 +(35)6:329 +9°]:31; e (2° +9² +56 +36²) : (06 +44 +34 +25³ +64).
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