33. Вычислите \(\left(\frac{13}{15}-\frac{3}{5}\right)+\left(\frac{17}{30}-\frac{1}{10}\right)\).

\[\left(\frac{13}{15}-\frac{3}{5}\right)+\left(\frac{17}{30}-\frac{1}{10}\right)=\left(\frac{13}{15}-\frac{9}{15}\right)+\left(\frac{17}{30}-\frac{3}{30}\right)=\frac{4}{15}+\frac{14}{30}=\frac{4}{15}+\frac{7}{15}=\frac{11}{15}.\]

Ответ: \(\frac{11}{15}\).