dsolve(diff(y(x),x) = -(y(x)^2+2*x*y(x)+x^2+exp(2*(x-y(x))^3*(y(x)+x)^3/(-y(x)^2+x^2-1)))/(-y(x)^2-2*x*y(x)-x^2+exp(2*(x-y(x))^3*(y(x)+x)^3/(-y(x)^2+x^2-1))),y(x))