\[ -x y(x)^4 y'(x)+y'(x)^3-y(x)^5=0 \] ✗ Mathematica : cpu = 5541.33 (sec), leaf count = 0 , timed out
$Aborted
✓ Maple : cpu = 0.692 (sec), leaf count = 43
\[ \left \{ y \left ( x \right ) ={\it \_C1}\,\sqrt {{\frac {{{\it \_C1}}^{10}}{ \left ( {{\it \_C1}}^{4}x-1 \right ) ^{2}}}},y \left ( x \right ) =-{\frac {3\,\sqrt {3}}{2}{x}^{-{\frac {3}{2}}}},y \left ( x \right ) ={\frac {3\,\sqrt {3}}{2}{x}^{-{\frac {3}{2}}}} \right \} \]