Ответ:

\(\frac{7}{4}-\frac{11}{6}=-\frac{1}{12}\).

\(\frac{5}{2}-\left(-\frac{1}{12}\right)=\frac{31}{12}\).

\(3-\frac{31}{12}=\frac{5}{12}\).

\(2-\frac{5}{12}-\frac{4}{9}=\frac{72-15-16}{36}=\frac{41}{36}\).

Ответ: \(\frac{41}{36}\).