\[\boxed{\text{5.482.}}\]
\[\textbf{а)}\ 4 + \left( \frac{7}{8} + \frac{3}{16} \right) = 4 + \frac{14}{16} + \frac{3}{16} =\]
\[= 4 + \frac{17}{16} = 4 + 1\frac{1}{16} = 5\frac{1}{16}\]
\[\textbf{б)}\ \left( \frac{2}{3} + \frac{7}{8} \right) - \left( \frac{11}{24} - \frac{5}{12} \right) =\]
\[= \frac{16}{24} + \frac{21}{24} - \frac{11}{24} + \frac{10}{24} = \frac{36}{24} =\]
\[= \frac{3}{2} = 1\frac{1}{2}\]
\[\textbf{в)}\ \frac{13}{12} - \frac{12}{13} - \frac{25}{156} =\]
\[= \frac{169}{156} - \frac{144}{156} - \frac{25}{156} =\]
\[= \frac{25}{156} - \frac{25}{156} = 0\]