$$2 \sqrt { 2 a ^ { 3 } } + 8 b ^ { 3 } - 27 c ^ { 3 } + 18 \sqrt { 2 a b c }$$
$8b^{3}-27c^{3}+18\sqrt{2abc}+\left(2a\right)^{\frac{3}{2}}$
$3\sqrt{\frac{2}{abc}}\left(\sqrt{bca^{2}}+3bc\right)$
