\[ y''(x)-6 y(x)^2=0 \] ✓ Mathematica : cpu = 0.0207943 (sec), leaf count = 14
\[\{\{y(x)\to \wp (x+c_1;0,c_2)\}\}\] ✓ Maple : cpu = 0.044 (sec), leaf count = 10
\[ \left \{ y \left ( x \right ) ={\it WeierstrassP} \left ( x+{\it \_C1},0,{\it \_C2} \right ) \right \} \]