\[ x^4 y^{(4)}(x)+8 x^3 y^{(3)}(x)+12 x^2 y''(x)=0 \] ✓ Mathematica : cpu = 0.0084236 (sec), leaf count = 30
\[\left \{\left \{y(x)\to \frac {1}{6} \left (\frac {c_1}{x^2}+\frac {3 c_2}{x}\right )+c_4 x+c_3\right \}\right \}\] ✓ Maple : cpu = 0.015 (sec), leaf count = 19
\[\left \{y \left (x \right ) = c_{4} x +c_{1}+\frac {c_{2}}{x}+\frac {c_{3}}{x^{2}}\right \}\]