\[5\frac{3}{8} + 3\frac{5}{7} + 1\frac{2}{5} + 4\frac{5}{8} =\]
\[= \left( 5\frac{3}{8} + 4\frac{5}{8} \right) + \left( 3\frac{5^{\backslash 5}}{7} + 1\frac{2^{\backslash 7}}{5} \right) =\]
\[= 9\frac{8}{8} + 3\frac{25}{35} + 1\frac{14}{35} =\]
\[= 10 + 4\frac{39}{35} = 10 + 5\frac{4}{35} =\]
\[= 15\frac{4}{35}\]