y'(x)=\frac{\sin \left(\frac{y(x)}{x}\right) \csc \left(\frac{y(x)}{2 x}\right) \sec \left(\frac{y(x)}{2 x}\right) \left(2 x^3 \sin \left(\frac{y(x)}{2 x}\right) \cos \left(\frac{y(x)}{2 x}\right)+y(x)\right)}{2 x}