\[ -(a+x) y(x)+16 x y''(x)+8 y'(x)=0 \] ✓ Mathematica : cpu = 0.0150418 (sec), leaf count = 74
\[\left \{\left \{y(x)\to c_1 e^{\frac {1}{4} (2 \log (x)-x)} U\left (\frac {a+6}{8},\frac {3}{2},\frac {x}{2}\right )+c_2 e^{\frac {1}{4} (2 \log (x)-x)} L_{\frac {1}{8} (-a-6)}^{\frac {1}{2}}\left (\frac {x}{2}\right )\right \}\right \}\]
✓ Maple : cpu = 0.075 (sec), leaf count = 43
\[ \left \{ y \left ( x \right ) ={\it \_C1}\,\sqrt {x}{{\rm e}^{-{\frac {x}{4}}}}{{\sl M}\left ({\frac {a}{8}}+{\frac {3}{4}},\,{\frac {3}{2}},\,{\frac {x}{2}}\right )}+{\it \_C2}\,\sqrt {x}{{\rm e}^{-{\frac {x}{4}}}}{{\sl U}\left ({\frac {a}{8}}+{\frac {3}{4}},\,{\frac {3}{2}},\,{\frac {x}{2}}\right )} \right \} \]