\[
\boxed{
{\frac {\rm d}{{\rm d}x}}y \left( x \right) =1/9\,{\frac {x \left( y \left( x \right)  \right) ^{2}{{\rm e}^{3\,{x}^{2}}}}{{{\rm e}^{9/2\,{x}^{2}}}}F \left( 1/3\,{\frac { \left( 3+y \left( x \right)  \right) {{\rm e}^{3/2\,{x}^{2}}}}{y \left( x \right) }} \right) }=0}
\]