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33. Efectuați calculele: a) 15√7+34 b) 12√3-7/8√2-4[5√3+3(4√2-3√3)]:8): c) 5√3+3/4√2 +4[3√3+2(√3-3√2)]:20}- 7+31-41√3+5[2√7 +3(3√3-√7)]}; 2√2 5​