9.18   ODE No. 1854

\[ \boxed { {\frac {{\rm d}^{n}}{{\rm d}{x}^{n}}}y \left ( x \right ) -f \left ( {\frac {{\rm d}^{n-1}}{{\rm d}{x}^{n-1}}}y \left ( x \right ) \right ) =0} \]

1. Problem in Latex
2. Mathematica input
3. Maple input

Mathematica: cpu = 0 (sec), leaf count = 1 \[ \text {not solved} \]

Maple: cpu = 0.515 (sec), leaf count = 0 \[ \text {could not solve} \]