\[ y(x) \left (a x^2-(v-1) v\right )+x^2 y''(x)=0 \] ✓ Mathematica : cpu = 0.0357918 (sec), leaf count = 56
\[\left \{\left \{y(x)\to c_1 \sqrt {x} J_{\frac {1}{2} (2 v-1)}\left (\sqrt {a} x\right )+c_2 \sqrt {x} Y_{\frac {1}{2} (2 v-1)}\left (\sqrt {a} x\right )\right \}\right \}\]
✓ Maple : cpu = 0.027 (sec), leaf count = 33
\[ \left \{ y \left ( x \right ) ={\it \_C1}\,\sqrt {x}{{\sl J}_{v-{\frac {1}{2}}}\left (\sqrt {a}x\right )}+{\it \_C2}\,\sqrt {x}{{\sl Y}_{v-{\frac {1}{2}}}\left (\sqrt {a}x\right )} \right \} \]