\[2\frac{2}{5} = \frac{2 \cdot 5 + 2}{5} = \frac{12}{5}\]
\[2 - \frac{1}{3} = \frac{6}{3} - \frac{1}{3} = \frac{5}{3}\]
\[\frac{5}{3} : \frac{15}{13} = \frac{5}{3} \cdot \frac{13}{15} = \frac{5 \cdot 13}{3 \cdot 15} = \frac{65}{45} = \frac{13}{9}\]
\[\frac{12}{5} + \frac{13}{9} + 3 = \frac{12 \cdot 9 + 13 \cdot 5 + 3 \cdot 5 \cdot 9}{45} = \frac{108 + 65 + 135}{45} = \frac{308}{45} = 6\frac{38}{45}\]
Ответ: 6 38/45