✓ Mathematica : cpu = 0.0067445 (sec), leaf count = 21
DSolve[y[x] - (x + y[x])*Derivative[1][y][x] + (1 + x)*Derivative[1][y][x]^2 == 0,y[x],x]
✓ Maple : cpu = 0.036 (sec), leaf count = 45
dsolve((1+x)*diff(y(x),x)^2-(y(x)+x)*diff(y(x),x)+y(x) = 0,y(x))