$$\frac{2\sqrt{6}-2\sqrt{18}}{8-24}$$
$\frac{3\sqrt{2}-\sqrt{6}}{8}\approx 0.224143868$
$$\frac{2\sqrt{6}-2\times 3\sqrt{2}}{8-24}$$
$$\frac{2\sqrt{6}-6\sqrt{2}}{8-24}$$
$$\frac{2\sqrt{6}-6\sqrt{2}}{-16}$$
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$\frac{3 \sqrt{2} - \sqrt{6}}{8} = 0.22414386804201347$