\[\boxed{\text{5.359.}}\]
\[\textbf{а)}\ \frac{14}{18} - \frac{5}{18} = \frac{9}{18} = \frac{1}{2}\ \]
\[\textbf{б)}\ \frac{5}{22} + \frac{6}{22} = \frac{11}{22} = \frac{1}{2}\ \]
\[\textbf{в)}\ 6\frac{7}{12} - 1\frac{3}{12} = 5\frac{4}{12} = 5\frac{1}{3}\ \]
\[\textbf{г)}\ 7\frac{5}{27} + 3\frac{4}{27} = 10\frac{9}{27} = 10\frac{1}{3}\text{\ \ }\]