\[ y'(x)=\frac {y(x)}{x (y(x) F(x y(x))-1)} \] ✓ Mathematica : cpu = 0.271606 (sec), leaf count = 77
\[\text {Solve}\left [\int _1^{y(x)}\left (-\int _1^x\frac {F'(K[1] K[2])}{F(K[1] K[2])^2}dK[1]-\frac {1}{F(x K[2]) K[2]}+1\right )dK[2]+\int _1^x-\frac {1}{F(K[1] y(x)) K[1]}dK[1]=c_1,y(x)\right ]\] ✓ Maple : cpu = 0.192 (sec), leaf count = 26
\[ \left \{ -y \left ( x \right ) +\int ^{xy \left ( x \right ) }\!{\frac {1}{F \left ( {\it \_a} \right ) {\it \_a}}}{d{\it \_a}}-{\it \_C1}=0 \right \} \]