\[ -y(x) f'(x)+f(x) y'(x)+y(x) y''(x)-y'(x)^2-y(x)^3=0 \] ✗ Mathematica : cpu = 0.253147 (sec), leaf count = 0 , could not solve
DSolve[-y[x]^3 - y[x]*Derivative[1][f][x] + f[x]*Derivative[1][y][x] - Derivative[1][y][x]^2 + y[x]*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)*y(x)-diff(y(x),x)^2+f(x)*diff(y(x),x)-diff(f(x),x)*y(x)-y(x)^3=0,y(x))