xy^2-ln(x+1)+lny = 1y^2 + 2xyy' - 1/(x+1) + y'/y = 0(x+1)y^3 + 2x(x+1)y^2 y' - y + (x+1)y' = 0y' = y[1-(x+1)y^2]/[(x+1)(1+2xy^2)]
