$$5 \sqrt { 5 } + 3 \sqrt { 3 } 2 \sqrt { 2 } - 5 \sqrt { 3 }$$
$5\sqrt{5}+6\sqrt{6}-5\sqrt{3}\approx 17.217024306$
$$5\sqrt{5}+6\sqrt{3}\sqrt{2}-5\sqrt{3}$$
$$5\sqrt{5}+6\sqrt{6}-5\sqrt{3}$$
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