\[ -\text {f0}(x)-\text {f1}(x) y(x)-\text {f2}(x) y(x)^2-\text {f3}(x) y(x)^3+y'(x)=0 \] ✗ Mathematica : cpu = 135.783 (sec), leaf count = 0 , could not solve
DSolve[-f0[x] - f1[x]*y[x] - f2[x]*y[x]^2 - f3[x]*y[x]^3 + Derivative[1][y][x] == 0, y[x], x]
✗ Maple : cpu = 0. (sec), leaf count = 0 , could not solve
dsolve(diff(y(x),x)-f3(x)*y(x)^3-f2(x)*y(x)^2-f1(x)*y(x)-f0(x) = 0,y(x))