$$\frac{4}{3} + (-5\frac{1}{2} + \frac{5}{4} \cdot 3\frac{1}{5}) : \frac{9}{10} = $$
$$\frac{4}{3} + (-\frac{11}{2} + \frac{5}{4} \cdot \frac{16}{5}) : \frac{9}{10} = $$
$$\frac{4}{3} + (-\frac{11}{2} + \frac{5 \cdot 16}{4 \cdot 5}) : \frac{9}{10} = $$
$$\frac{4}{3} + (-\frac{11}{2} + \frac{16}{4}) : \frac{9}{10} = $$
$$\frac{4}{3} + (-\frac{11}{2} + 4) : \frac{9}{10} = $$
$$\frac{4}{3} + (-\frac{11}{2} + \frac{8}{2}) : \frac{9}{10} = $$
$$\frac{4}{3} + (-\frac{3}{2}) : \frac{9}{10} = $$
$$\frac{4}{3} + (-\frac{3}{2}) \cdot \frac{10}{9} = $$
$$\frac{4}{3} + (-\frac{3 \cdot 10}{2 \cdot 9}) = $$
$$\frac{4}{3} + (-\frac{30}{18}) = $$
$$\frac{4}{3} + (-\frac{5}{3}) = $$
$$\frac{4}{3} - \frac{5}{3} = $$
$$-\frac{1}{3}$$
Ответ: -1/3