[Risolto] Chi può aiutarmi con questa espressione per favore

=============================================================

$\dfrac{14}{10}-\bigg(\dfrac{9+1}{15}\bigg)·\dfrac{1}{2}-\dfrac{8}{10} : \bigg(\dfrac{10-6}{15}\bigg)$=

=$\dfrac{7}{5}-\dfrac{10}{15}·\dfrac{1}{2}-\dfrac{4}{5} : \dfrac{4}{15}$=

=$\dfrac{7}{5}-\dfrac{2}{3}·\dfrac{1}{2}-\dfrac{4}{5} · \dfrac{15}{4}$=

=$\dfrac{7}{5}-\dfrac{2}{6}-\dfrac{1}{1} · \dfrac{3}{1}$=

=$\dfrac{7}{5}-\dfrac{1}{3}-3$=

=$\dfrac{21-5-45}{15}$=

=$-\dfrac{29}{15}$