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10. Calculați: a) √3-√5 + √3+√3|-|3-2√5; b)/2-√5|-|√3+√5 + 1-√3-√3-31; c) √3+√2-√3+5/-11-√2 +1-51; d) |√2-√3+2-√3+1-√√2-1-31. ​