\[ y'(x)=\frac {x^6 \sqrt {4 x^2 y(x)+1}+x^5 \sqrt {4 x^2 y(x)+1}+x^3 \sqrt {4 x^2 y(x)+1}+\frac {1}{2}}{x^3} \] ✓ Mathematica : cpu = 0.381993 (sec), leaf count = 74
\[\left \{\left \{y(x)\to \frac {-160 c_1 x^7-200 c_1 x^6-400 c_1 x^4+400 c_1^2 x^2+16 x^{12}+40 x^{11}+25 x^{10}+80 x^9+100 x^8+100 x^6-100}{400 x^2}\right \}\right \}\]
✓ Maple : cpu = 0.491 (sec), leaf count = 40
\[ \left \{ -{\it \_C1}+{\frac {1}{x} \left ( -4\,{x}^{6}-5\,{x}^{5}-10\,{x}^{3}+10\,\sqrt {4\,{x}^{2}y \left ( x \right ) +1} \right ) }=0 \right \} \]