\[ x^3 y^{(4)}(x)+6 x^2 y^{(3)}(x)+6 x y''(x)=0 \] ✓ Mathematica : cpu = 0.0079386 (sec), leaf count = 29
\[\left \{\left \{y(x)\to c_4 x+\frac {1}{2} \left (\frac {c_1}{x}-2 c_2 \log (x)\right )+c_3\right \}\right \}\] ✓ Maple : cpu = 0.013 (sec), leaf count = 18
\[\left \{y \left (x \right ) = c_{2} \ln \left (x \right )+c_{4} x +c_{1}+\frac {c_{3}}{x}\right \}\]