\(\rm \frac{7}{{5 - \frac{8}{3}}} \div \frac{{3 - \frac{2}{{3 - \frac{3}{2}}}}}{{4 - \frac{3}{2}}} - \frac{6}{7}of\left\{ {\frac{1}{{1\frac{3}{7}}} + \frac{6}{5}of\frac{{3\frac{1}{3} - 2\frac{1}{2}}}{{\frac{{47}}{{21}} - \frac{{10}}{5}}}}\right\} = \)
1
\(\frac{1}{10}\)
2
\(\frac{7}{10}\)
3
\(\frac{3}{10}\)
4
1