$$(5/2+7/5)=(7/5+5/2$$
$\text{true}$
$$\frac{25}{10}+\frac{14}{10}=\frac{7}{5}+\frac{5}{2}$$
$$\frac{25+14}{10}=\frac{7}{5}+\frac{5}{2}$$
$$\frac{39}{10}=\frac{7}{5}+\frac{5}{2}$$
$$\frac{39}{10}=\frac{14}{10}+\frac{25}{10}$$
$$\frac{39}{10}=\frac{14+25}{10}$$
$$\frac{39}{10}=\frac{39}{10}$$
$$\text{true}$$
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