\[ \left (y'(x)^2+1\right ) \left (y'(x) h(x,y(x))+j(x,y(x))\right )+y''(x)=0 \] ✗ Mathematica : cpu = 0.154704 (sec), leaf count = 0 , could not solve
DSolve[(j[x, y[x]] + h[x, y[x]]*Derivative[1][y][x])*(1 + Derivative[1][y][x]^2) + Derivative[2][y][x] == 0, y[x], x]
✗ Maple : cpu = 0. (sec), leaf count = 0 , could not solve
dsolve(diff(diff(y(x),x),x)+(diff(y(x),x)^2+1)*(h(x,y(x))*diff(y(x),x)+j(x,y(x)))=0,y(x))