Решение:
\[1 \frac{1}{2} = \frac{3}{2}\]
\[7 \frac{1}{2} = \frac{15}{2}\]
\[\frac{13}{15} \cdot \frac{3}{2} = \frac{13 \cdot 3}{15 \cdot 2} = \frac{13 \cdot 1}{5 \cdot 2} = \frac{13}{10}\]
\[5 : \frac{15}{2} = 5 \cdot \frac{2}{15} = \frac{5 \cdot 2}{15} = \frac{1 \cdot 2}{3} = \frac{2}{3}\]
\[-\frac{6}{5} + \frac{12}{35} - \frac{13}{10} + \frac{2}{3} = -\frac{6 \cdot 42}{5 \cdot 42} + \frac{12 \cdot 6}{35 \cdot 6} - \frac{13 \cdot 21}{10 \cdot 21} + \frac{2 \cdot 70}{3 \cdot 70} = \frac{-252 + 72 - 273 + 140}{210} = \frac{-313}{210}\]
\[-\frac{313}{210} = -1 \frac{103}{210}\]
Ответ: -1 103/210