y'(x)=\frac{-x^2 \sqrt{x^2+y(x)^2}+x y(x) \sqrt{x^2+y(x)^2}+x^5 \left(-\sqrt{x^2+y(x)^2}\right)+x^4 y(x) \sqrt{x^2+y(x)^2}-x^4 \sqrt{x^2+y(x)^2}+x^3 y(x) \sqrt{x^2+y(x)^2}+y(x)}{x}