3) (3\frac{1}{3})^2 - 2\frac{13}{16} \cdot 9\frac{2}{5} ;

3)

(3\frac{1}{3})^2 - 2\frac{13}{16} \cdot 9\frac{2}{5} = (\frac{10}{3})^2 - \frac{45}{16} \cdot \frac{47}{5} = \frac{100}{9} - \frac{9}{16} \cdot 47 = \frac{100}{9} - \frac{423}{16} = \frac{100 \cdot 16}{9 \cdot 16} - \frac{423 \cdot 9}{16 \cdot 9} = $$

$$= \frac{1600}{144} - \frac{3807}{144} = -\frac{2207}{144}= -15\frac{47}{144}$$

Ответ: $$-15\frac{47}{144}$$