Наименьший общий знаменатель для 4, 12 и 3 - это 12.
\[ 2 - \frac{11}{12} = \frac{2 \times 12}{12} - \frac{11}{12} = \frac{24}{12} - \frac{11}{12} = \frac{13}{12} \]
\[ \frac{9}{4} + \frac{13}{12} - \frac{11}{3} \]
\[ \frac{9 \times 3}{4 \times 3} + \frac{13}{12} - \frac{11 \times 4}{3 \times 4} = \frac{27}{12} + \frac{13}{12} - \frac{44}{12} \]
\[ \frac{27 + 13 - 44}{12} = \frac{40 - 44}{12} = \frac{-4}{12} \]
\[ \frac{-4}{12} = -\frac{1}{3} \]
Ответ: -1/3