$$1 \frac{1}{2} \cdot 2 \frac{10}{13} + 2 \frac{3}{4} \cdot 2 \frac{10}{13} - 2 \frac{10}{13} \cdot \frac{1}{6} = 2 \frac{10}{13} \cdot \left(1 \frac{1}{2} + 2 \frac{3}{4} - \frac{1}{6}\right) = 2 \frac{10}{13} \cdot \left(\frac{3}{2} + \frac{11}{4} - \frac{1}{6}\right) = \frac{36}{13} \cdot \left(\frac{3 \cdot 6}{2 \cdot 6} + \frac{11 \cdot 3}{4 \cdot 3} - \frac{1 \cdot 2}{6 \cdot 2}\right) = \frac{36}{13} \cdot \left(\frac{18}{12} + \frac{33}{12} - \frac{2}{12}\right) = \frac{36}{13} \cdot \frac{18+33-2}{12} = \frac{36}{13} \cdot \frac{49}{12} = \frac{3 \cdot 49}{13} = \frac{147}{13} = 11 \frac{4}{13}$$
Ответ: $$11 \frac{4}{13}$$