\[ x^2 y^{(3)}(x)+6 y'(x)+6 x y''(x)=0 \] ✓ Mathematica : cpu = 0.0055499 (sec), leaf count = 24
\[\left \{\left \{y(x)\to -\frac {c_1}{2 x^2}-\frac {c_2}{x}+c_3\right \}\right \}\] ✓ Maple : cpu = 0.01 (sec), leaf count = 16
\[ \left \{ y \left ( x \right ) ={\it \_C1}+{\frac {{\it \_C2}}{{x}^{2}}}+{\frac {{\it \_C3}}{x}} \right \} \]