\[ y(x) \left (2 x (2 l-m+1)-m^2-x^2+1\right )+4 x^2 y''(x)+4 x y'(x)=0 \] ✓ Mathematica : cpu = 0.0396806 (sec), leaf count = 97
\[\left \{\left \{y(x)\to e^{-x/2} x^{\frac {\sqrt {m^2-1}}{2}} \left (c_1 U\left (\frac {1}{2} \left (-2 l+m+\sqrt {m^2-1}\right ),\sqrt {m^2-1}+1,x\right )+c_2 L_{l-\frac {m}{2}-\frac {\sqrt {m^2-1}}{2}}^{\sqrt {m^2-1}}(x)\right )\right \}\right \}\]
✓ Maple : cpu = 0.164 (sec), leaf count = 53
\[ \left \{ y \left ( x \right ) ={1 \left ( {\it \_C2}\,{{\sl W}_{l-{\frac {m}{2}}+{\frac {1}{2}},\,{\frac {1}{2}\sqrt {m-1}\sqrt {m+1}}}\left (x\right )}+{\it \_C1}\,{{\sl M}_{l-{\frac {m}{2}}+{\frac {1}{2}},\,{\frac {1}{2}\sqrt {m-1}\sqrt {m+1}}}\left (x\right )} \right ) {\frac {1}{\sqrt {x}}}} \right \} \]