\[ f(x)+y''(x) h\left (y'(x)\right )+j(y(x)) y'(x)=0 \] ✗ Mathematica : cpu = 0.0331447 (sec), leaf count = 0
DSolve[f[x] + j[y[x]]*Derivative[1][y][x] + h[Derivative[1][y][x]]*Derivative[2][y][x] == 0,y[x],x]
, could not solve
DSolve[f[x] + j[y[x]]*Derivative[1][y][x] + h[Derivative[1][y][x]]*Derivative[2][y][x] == 0, y[x], x]
✓ Maple : cpu = 0.084 (sec), leaf count = 26
dsolve(h(diff(y(x),x))*diff(diff(y(x),x),x)+5*diff(y(x),x)+f=0,y(x))
\[y \left (x \right ) = \int \RootOf \left (x +\int _{}^{\textit {\_Z}}\frac {h \left (\textit {\_f} \right )}{5 \textit {\_f} +f}d \textit {\_f} +c_{1}\right )d x +c_{2}\]