Solve the Differential Equation $$x ^ { 2 } \frac { d y } { d x } - y = 4 x ^ { 3 } e ^ { - 1 / x }$$

Solve the differential equation. $$x ^ { 2 } \frac { d y } { d x } - y = 4 x ^ { 3 } e ^ { - 1 / x }$$