\[ 6 \frac{3}{5} = \frac{6 \times 5 + 3}{5} = \frac{33}{5} ]
Общий знаменатель для 5, 25, 8 равен 200.
\[ \frac{13}{5} = \frac{13 \times 40}{5 \times 40} = \frac{520}{200} ]
\[ \frac{14}{25} = \frac{14 \times 8}{25 \times 8} = \frac{112}{200} ]
\[ \frac{7}{8} = \frac{7 \times 25}{8 \times 25} = \frac{175}{200} ]
\[ \frac{33}{5} = \frac{33 \times 40}{5 \times 40} = \frac{1320}{200} ]
\[ \frac{520}{200} + \frac{112}{200} - \frac{175}{200} + \frac{1320}{200} = \frac{520 + 112 - 175 + 1320}{200} = \frac{1777}{200} ]
\[ \frac{1777}{200} = 8 \frac{177}{200} ]
Ответ: 8 177/200