\[ -l y(x)+\left (x^2-1\right ) y''(x)+2 x y'(x)=0 \] ✓ Mathematica : cpu = 0.0098678 (sec), leaf count = 46
\[\left \{\left \{y(x)\to c_1 P_{\frac {1}{2} \left (\sqrt {4 l+1}-1\right )}(x)+c_2 Q_{\frac {1}{2} \left (\sqrt {4 l+1}-1\right )}(x)\right \}\right \}\] ✓ Maple : cpu = 0.048 (sec), leaf count = 35
\[y \relax (x ) = c_{1} \LegendreP \left (\frac {\sqrt {1+4 l}}{2}-\frac {1}{2}, x\right )+c_{2} \LegendreQ \left (\frac {\sqrt {1+4 l}}{2}-\frac {1}{2}, x\right )\]