\[ y'(x)=\frac {x^2 F\left (\frac {y(x)}{x}\right )+y(x)}{x} \] ✓ Mathematica : cpu = 0.0821495 (sec), leaf count = 24
\[\text {Solve}\left [c_1+x=\int _1^{\frac {y(x)}{x}} \frac {1}{F(K[1])} \, dK[1],y(x)\right ]\]
✓ Maple : cpu = 0.014 (sec), leaf count = 20
\[ \left \{ y \left ( x \right ) ={\it RootOf} \left ( x-\int ^{{\it \_Z}}\! \left ( F \left ( {\it \_a} \right ) \right ) ^{-1}{d{\it \_a}}+{\it \_C1} \right ) x \right \} \]