\[ x^3 y^{(4)}(x)+6 x^2 y^{(3)}(x)+6 x y''(x)=0 \] ✓ Mathematica : cpu = 0.0287176 (sec), leaf count = 27
\[\left \{\left \{y(x)\to \frac {c_2}{2 x}+c_4 x-c_1 \log (x)+c_3\right \}\right \}\]
✓ Maple : cpu = 0.014 (sec), leaf count = 18
\[ \left \{ y \left ( x \right ) ={\it \_C1}+{\it \_C2}\,\ln \left ( x \right ) +{\frac {{\it \_C3}}{x}}+{\it \_C4}\,x \right \} \]