$$\frac { 1 } { \sqrt { 7 } - 2 }$$
$\frac{\sqrt{7}+2}{3}\approx 1.54858377$
$$\frac{\sqrt{7}+2}{\left(\sqrt{7}-2\right)\left(\sqrt{7}+2\right)}$$
$$\frac{\sqrt{7}+2}{\left(\sqrt{7}\right)^{2}-2^{2}}$$
$$\frac{\sqrt{7}+2}{7-4}$$
$$\frac{\sqrt{7}+2}{3}$$
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