✓ Mathematica : cpu = 0.0508612 (sec), leaf count = 36
DSolve[x^2*y[x] - (-a + x^3 + y[x]^3)*Derivative[1][y][x] + x*y[x]^2*Derivative[1][y][x]^2 == 0,y[x],x]
✓ Maple : cpu = 1.142 (sec), leaf count = 247
dsolve(x*y(x)^2*diff(y(x),x)^2-(y(x)^3+x^3-a)*diff(y(x),x)+x^2*y(x)=0,y(x))