$$\frac{2,4\cdot3,6:0,12-62}{20\cdot\frac{3}{4}-5}$$
$1$
$$\frac{\frac{8,64}{0,12}-62}{20\times \frac{3}{4}-5}$$
$$\frac{\frac{864}{12}-62}{20\times \frac{3}{4}-5}$$
$$\frac{72-62}{20\times \frac{3}{4}-5}$$
$$\frac{10}{20\times \frac{3}{4}-5}$$
$$\frac{10}{\frac{20\times 3}{4}-5}$$
$$\frac{10}{\frac{60}{4}-5}$$
$$\frac{10}{15-5}$$
$$\frac{10}{10}$$
$$1$$
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