Răspuns:
[tex]( - \frac{1}{10} + \frac{2}{15}) \times ( - 7 \frac{1}{2} ) \times ( - 4) \times ( - \frac{7}{20} + \frac{4}{15} ) = [/tex]
[tex]( \frac{( - 3 + 4)}{30} ) \times ( - \frac{15}{2} ) \times ( - 4) \times ( \frac{( - 21 + 16)}{60} ) = [/tex]
[tex] \frac{1}{30} \times 30 \times ( - \frac{1}{12} ) = [/tex]
[tex] - \frac{1}{12} [/tex]
