\[ \boxed { \left ( {\frac {\rm d}{{\rm d}x}}y \left ( x \right ) \right ) ^{2}+ax{\frac {\rm d}{{\rm d}x}}y \left ( x \right ) +by \left ( x \right ) +c{x}^{2}=0} \]
Mathematica: cpu = 0 (sec), leaf count = 0 \[ \text {Hanged} \]
Maple: cpu = 0 (sec), leaf count = 0 \[ \text {hanged} \]