What Polynomial Should Be Subtracted From $2 x ^ { 3 } y ^ { 3 } - 6 x y + 3 y$

Essay

What polynomial should be subtracted from $2 x ^ { 3 } y ^ { 3 } - 6 x y + 3 y$ to obtain the polynomial $- 4 x ^ { 3 } y ^ { 3 } - 13 x y + 13 y$ ?