The value of $$3\frac{1}{5}-[2\frac{1}{2}-(\frac{5}{6}-(\frac{2}{5}+\frac{3}{10}-\frac{4}{15}))]$$ is:
$$\frac{16}{5\ }-\ \left[\frac{5}{2}-\left(\ \frac{5}{6}\ -\ \left(\frac{2}{5}+\frac{3}{10}-\frac{4}{15}\right)\right)\right]$$According to question ,
$$\frac{16}{5}-\left(\frac{5}{2}-\left(\frac{5}{6}-\frac{7}{30}\right)\right)=$$
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