$$\sqrt{ 7 } + \sqrt{ 5 } / \sqrt{ 7 } - \sqrt{ 5 }$$
$\frac{\sqrt{35}}{7}+\sqrt{7}-\sqrt{5}\approx 1.254837588$
$$\sqrt{7}+\frac{\sqrt{5}\sqrt{7}}{\left(\sqrt{7}\right)^{2}}-\sqrt{5}$$
$$\sqrt{7}+\frac{\sqrt{5}\sqrt{7}}{7}-\sqrt{5}$$
$$\sqrt{7}+\frac{\sqrt{35}}{7}-\sqrt{5}$$
$$\frac{7\left(\sqrt{7}-\sqrt{5}\right)}{7}+\frac{\sqrt{35}}{7}$$
$$\frac{7\left(\sqrt{7}-\sqrt{5}\right)+\sqrt{35}}{7}$$
$$\frac{7\sqrt{7}-7\sqrt{5}+\sqrt{35}}{7}$$
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