Răspuns:
[tex]( \frac{2}{5} - \frac{1}{2} - \frac{1}{3} )(2 - \frac{1}{3} - \frac{1}{2} - \ \frac{1}{4} ) \\ \\ (\frac{4}{10} - \frac{5}{10} - \frac{1}{3} )(2 - \frac{1}{3} - \frac{1}{2} - \frac{1}{3} ) \\ \\ ( - \frac{1}{10} - \frac{1}{3} )( \frac{2}{1} - \frac{1}{2} - \frac{1}{3} ) \\ \\ - \frac{ 3}{30} - \frac{10}{30} \times \frac{4}{2} - \frac{1}{2} - \frac{1}{3} \\ \\ - \frac{13}{30} \times \frac{3}{2} - \frac{1}{3} \\ \\ - \frac{39}{60} - \frac{1}{3} \\ \\ - \frac{39}{60} - \frac{20}{60} \\ \\ - \frac{59}{60} [/tex]
