Ответ:

\[9\frac14\cdot8-3\frac23\cdot4\frac12-10\frac45\cdot4\frac7{12}\]

\[=\frac{37}{4}\cdot8-\frac{11}{3}\cdot\frac92-\frac{54}{5}\cdot\frac{55}{12}\]

\[=74-\frac{33}{2}-\frac{99}{2}=74-66=8.\]

Ответ: 8.