\[ y(x) (-(-2 m-4 n+x))+4 m y'(x)+4 x y''(x)=0 \] ✓ Mathematica : cpu = 0.0335276 (sec), leaf count = 32
\[\left \{\left \{y(x)\to e^{-x/2} \left (c_1 U(-n,m,x)+c_2 L_n^{m-1}(x)\right )\right \}\right \}\]
✓ Maple : cpu = 0.135 (sec), leaf count = 26
\[ \left \{ y \left ( x \right ) ={{\rm e}^{-{\frac {x}{2}}}} \left ( {{\sl U}\left (-n,\,m,\,x\right )}{\it \_C2}+{{\sl M}\left (-n,\,m,\,x\right )}{\it \_C1} \right ) \right \} \]