Ответ:

\(\frac{3}{5}-\frac{7}{10}=-\frac{1}{10}\), значит \(-\left(-\frac{1}{10}\right)=\frac{1}{10}\).

\(\frac{1}{10}:\left(-\frac{9}{14}\right)=-\frac{7}{45}\).

\(-\frac{7}{45}-\frac{11}{6}=-\frac{14+165}{90}=-\frac{179}{90}\).

Ответ: \(-\frac{179}{90}\).