2.1855   ODE No. 1855

\[ y^{(n)}(x)-f\left (\frac {\partial ^{n-2}y(x)}{\partial x^{n-2}}\right )=0 \] Mathematica : cpu = 0.0030398 (sec), leaf count = 0


, could not solve

DSolve[-f[D[y[x], {x, -2 + n}]] + Derivative[n][y][x] == 0, y[x], x]

Maple : cpu = 0. (sec), leaf count = 0


, exception

unable to handle ODEs of undefined differential order