$$( 2 \sqrt { 6 } + 7 \sqrt { 7 } ) + ( 13 \sqrt { 2 } - 4 \sqrt { 7 } )$$
$2\sqrt{6}+3\sqrt{7}+13\sqrt{2}\approx 31.22100973$
$$2\sqrt{6}+3\sqrt{7}+13\sqrt{2}$$
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