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3. Efectuează: a) (4° +4¹ +42)5:214+ 21⁰; b) [62024 : 361010 + (511)3 : 2515 - 2023°] - [(35)4: 98 +12026]; c) 624 : 623-6-(254)5: 53⁹; d)[(11-02023). (33-3²) + 12025]. (32-2³) - 3².2.​