\[ x^4-2 x^2 y(x)+y'(x)+y(x)^2-2 x-1=0 \] ✓ Mathematica : cpu = 0.0205734 (sec), leaf count = 25
\[\left \{\left \{y(x)\to \frac {1}{c_1 \left (-e^{2 x}\right )-\frac {1}{2}}+x^2+1\right \}\right \}\]
✓ Maple : cpu = 0.177 (sec), leaf count = 37
\[ \left \{ y \left ( x \right ) ={\frac {{x}^{2} \left ( {{\rm e}^{x}} \right ) ^{2}{\it \_C1}-{x}^{2}+ \left ( {{\rm e}^{x}} \right ) ^{2}{\it \_C1}+1}{ \left ( {{\rm e}^{x}} \right ) ^{2}{\it \_C1}-1}} \right \} \]