$$5+ \sqrt{ 3 } \div 2- \sqrt{ 3 } +2- \sqrt{ 3 } \div 2+ \sqrt{ 3 }$$
$7$
$$5-\frac{1}{2}\sqrt{3}+2-\frac{\sqrt{3}}{2}+\sqrt{3}$$
$$7-\frac{1}{2}\sqrt{3}-\frac{\sqrt{3}}{2}+\sqrt{3}$$
$$7-\sqrt{3}+\sqrt{3}$$
$$7$$
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