\[ y''(x)-y(x)^2=0 \] ✓ Mathematica : cpu = 0.0323262 (sec), leaf count = 26
\[\left \{\left \{y(x)\to \sqrt [3]{6} \wp \left (\frac {x+c_1}{\sqrt [3]{6}};0,c_2\right )\right \}\right \}\] ✓ Maple : cpu = 0.753 (sec), leaf count = 12
\[y \relax (x ) = 6 \WeierstrassP \left (x +c_{1}, 0, c_{2}\right )\]