в) \(-4\frac{3}{5} - \left(-2\frac{5}{6} - 1\frac{1}{3}\right) = -4\frac{3}{5} - \left(-\frac{17}{6} - \frac{4}{3}\right) = -4\frac{3}{5} - \left(-\frac{17}{6} - \frac{8}{6}\right) = -4\frac{3}{5} - \left(-\frac{25}{6}\right) = -4\frac{3}{5} + \frac{25}{6} = -\frac{23}{5} + \frac{25}{6} = -\frac{138}{30} + \frac{125}{30} = -\frac{13}{30}\)