$$5\frac{5}{6}+[2\frac{2}{3}-[{3\frac{3}{4}(3\frac{4}{5}\div9\frac{1}{2})}]]$$
According to question,
$$\frac{35}{6}+\left[\frac{8}{3}-\left[\frac{15}{4}\left(\frac{19}{5}\ \times\ \frac{2}{19}\right)\right]\right]$$
$$\frac{35}{6}+\left[\frac{8}{3}-\left[\frac{15}{4}\times\ \frac{2}{5}\right]\right]$$
$$\frac{35}{6}+\left[\frac{8}{3}-\frac{3}{2}\right]$$
$$\frac{35}{6}+\frac{7}{6}=7\ Ans$$
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