\[ 9 y(x)^2 y^{(3)}(x)+40 y'(x)^3-45 y(x) y'(x) y''(x)=0 \] ✗ Mathematica : cpu = 0.0750347 (sec), leaf count = 0 , could not solve
DSolve[40*Derivative[1][y][x]^3 - 45*y[x]*Derivative[1][y][x]*Derivative[2][y][x] + 9*y[x]^2*Derivative[3][y][x] == 0, y[x], x]
✓ Maple : cpu = 0.281 (sec), leaf count = 17
\[ \left \{ y \left ( x \right ) ={{\it \_C3} \left ( -9+ \left ( x+{\it \_C2} \right ) ^{2}{\it \_C1} \right ) ^{-{\frac {3}{2}}}} \right \} \]