$$2 \times 5/6 \times 6 \times 2/5$$
$4$
$$\frac{\frac{10}{6}\times 6\times 2}{5}$$
$$\frac{\frac{5}{3}\times 6\times 2}{5}$$
$$\frac{\frac{5\times 6}{3}\times 2}{5}$$
$$\frac{\frac{30}{3}\times 2}{5}$$
$$\frac{10\times 2}{5}$$
$$\frac{20}{5}$$
$$4$$
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$2^{2}$
