\[
\boxed{
 \left( a \left( y \left( x \right)  \right) ^{2}+2\,bxy \left( x \right) +c{x}^{2} \right) {\frac {\rm d}{{\rm d}x}}y \left( x \right) +b \left( y \left( x \right)  \right) ^{2}+2\,cxy \left( x \right) +d{x}^{2}=0}
\]