Ответ:
\(2:2\frac{2}{3}+1\frac{4}{5}\cdot3\frac{1}{3}-2\frac{5}{6}=2:\frac{8}{3}+\frac{9}{5}\cdot\frac{10}{3}-\frac{17}{6}\).
\(=\frac{3}{4}+6-\frac{17}{6}=\frac{9+72-34}{12}=\frac{47}{12}=3\frac{11}{12}\).
Ответ: \(3\frac{11}{12}\).
\(2:2\frac{2}{3}+1\frac{4}{5}\cdot3\frac{1}{3}-2\frac{5}{6}=2:\frac{8}{3}+\frac{9}{5}\cdot\frac{10}{3}-\frac{17}{6}\).
\(=\frac{3}{4}+6-\frac{17}{6}=\frac{9+72-34}{12}=\frac{47}{12}=3\frac{11}{12}\).
Ответ: \(3\frac{11}{12}\).