\[ y''(x)-6 y(x)^2=0 \] ✓ Mathematica : cpu = 0.0280298 (sec), leaf count = 14
\[\left \{\left \{y(x)\to \wp \left (x+c_1;0,c_2\right )\right \}\right \}\] ✓ Maple : cpu = 0.017 (sec), leaf count = 10
\[ \left \{ y \left ( x \right ) ={\it WeierstrassP} \left ( x+{\it \_C1},0,{\it \_C2} \right ) \right \} \]