$$1\frac{7}{53}of[1\frac{1}{5}-\{3\frac{4}{5}\div(\frac{1}{2}+\frac{1}{3})\}\times3\frac{3}{4}]$$
$-18fo$
$$\frac{53+7}{53}of\left(\frac{1\times 5+1}{5}-\frac{\frac{3\times 5+4}{5}}{\frac{1}{2}+\frac{1}{3}}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{1\times 5+1}{5}-\frac{\frac{3\times 5+4}{5}}{\frac{1}{2}+\frac{1}{3}}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{5+1}{5}-\frac{\frac{3\times 5+4}{5}}{\frac{1}{2}+\frac{1}{3}}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{\frac{3\times 5+4}{5}}{\frac{1}{2}+\frac{1}{3}}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{\frac{15+4}{5}}{\frac{1}{2}+\frac{1}{3}}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{\frac{19}{5}}{\frac{1}{2}+\frac{1}{3}}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{\frac{19}{5}}{\frac{3}{6}+\frac{2}{6}}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{\frac{19}{5}}{\frac{3+2}{6}}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{\frac{19}{5}}{\frac{5}{6}}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{19}{5}\times \frac{6}{5}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{19\times 6}{5\times 5}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{114}{25}\times \frac{3\times 4+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{114}{25}\times \frac{12+3}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{114}{25}\times \frac{15}{4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{114\times 15}{25\times 4}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{1710}{100}\right)$$
$$\frac{60}{53}of\left(\frac{6}{5}-\frac{171}{10}\right)$$
$$\frac{60}{53}of\left(\frac{12}{10}-\frac{171}{10}\right)$$
$$\frac{60}{53}of\times \frac{12-171}{10}$$
$$\frac{60}{53}of\left(-\frac{159}{10}\right)$$
$$\frac{60\left(-159\right)}{53\times 10}of$$
$$\frac{-9540}{530}of$$
$$-18of$$
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