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2impartit la 1supra4+1supra3-1supra3paranteza rotunda1supra2+1supra5 inchidem paranteza

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[tex]2: \frac{1}{4}+ \frac{1}{3}- \frac{1}{3}( \frac{1}{2}+ \frac{1}{5})= \frac{2}{1}* \frac{4}{1}( \frac{5}{10}+ \frac{2}{10})= \frac{8}{1}*\frac{7}{10}=\frac{56}{10}=5\frac{6}{10}[/tex]

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