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1. Calculaţi: a) 729:27: (145-952:7); c) e) 145-25-(41-3-13)-(435-36-5):15; 2. Calculati 144-5-[37-9-(111-107)]:20; b) 1296: (45-64:16-120:6:4); d) [26+3 (600: 75+1)-2]:8; f) 676:13:[100-3-11-(79-19-4).​