\[
\boxed{
x \left( 2\,x-1 \right) {\frac {\rm d}{{\rm d}x}}y \left( x \right) + \left( y \left( x \right)  \right) ^{2}- \left( 4\,x+1 \right) y \left( x \right) +4\,x=0}
\]