$$\frac{6}{7}-\frac{2}{7}+\frac{5}{7}=$$
$\frac{9}{7}\approx 1.285714286$
$$\frac{6-2}{7}+\frac{5}{7}$$
$$\frac{4}{7}+\frac{5}{7}$$
$$\frac{4+5}{7}$$
$$\frac{9}{7}$$
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$\frac{3 ^ {2}}{7} = 1\frac{2}{7} = 1.2857142857142858$