Find the Second Partial Derivatives of the Function $g ( x , y ) = 2 x ^ { 3 } y ^ { 2 } + 9 x y ^ { 3 } - 6 x + 8 y + 5$

Find the second partial derivatives of the function $g ( x , y ) = 2 x ^ { 3 } y ^ { 2 } + 9 x y ^ { 3 } - 6 x + 8 y + 5$