$$( 2 \sqrt { 3 } + 3 \sqrt { 2 } ) ^ { 2 }$$
$12\sqrt{6}+30\approx 59.393876913$
$$4\left(\sqrt{3}\right)^{2}+12\sqrt{3}\sqrt{2}+9\left(\sqrt{2}\right)^{2}$$
$$4\times 3+12\sqrt{3}\sqrt{2}+9\left(\sqrt{2}\right)^{2}$$
$$12+12\sqrt{3}\sqrt{2}+9\left(\sqrt{2}\right)^{2}$$
$$12+12\sqrt{6}+9\left(\sqrt{2}\right)^{2}$$
$$12+12\sqrt{6}+9\times 2$$
$$12+12\sqrt{6}+18$$
$$30+12\sqrt{6}$$
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$12 \sqrt{6} + 30 = 59.393876913$
