\[ x^3 y^{(3)}(x)-4 x^2 y''(x)+\left (x^2+8\right ) x y'(x)-2 \left (x^2+4\right ) y(x)=0 \] ✓ Mathematica : cpu = 0.0775481 (sec), leaf count = 23
\[\left \{\left \{y(x)\to x \left (c_1 x-c_2 \sin (x)+c_3 \cos (x)\right )\right \}\right \}\]
✓ Maple : cpu = 0.226 (sec), leaf count = 18
\[ \left \{ y \left ( x \right ) =x \left ( \cos \left ( x \right ) {\it \_C3}+\sin \left ( x \right ) {\it \_C2}+{\it \_C1}\,x \right ) \right \} \]