3. Efectuează: a) (4⁰ +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. repede​