\[ -(a+x) y(x)+16 x y''(x)+8 y'(x)=0 \] ✓ Mathematica : cpu = 0.0134585 (sec), leaf count = 59
\[\left \{\left \{y(x)\to e^{-x/4} \sqrt {x} \left (c_1 U\left (\frac {a+6}{8},\frac {3}{2},\frac {x}{2}\right )+c_2 L_{\frac {1}{8} (-a-6)}^{\frac {1}{2}}\left (\frac {x}{2}\right )\right )\right \}\right \}\]
✓ Maple : cpu = 0.162 (sec), leaf count = 37
\[ \left \{ y \left ( x \right ) =\sqrt {x}{{\rm e}^{-{\frac {x}{4}}}} \left ( {{\sl U}\left ({\frac {a}{8}}+{\frac {3}{4}},\,{\frac {3}{2}},\,{\frac {x}{2}}\right )}{\it \_C2}+{{\sl M}\left ({\frac {a}{8}}+{\frac {3}{4}},\,{\frac {3}{2}},\,{\frac {x}{2}}\right )}{\it \_C1} \right ) \right \} \]