$$(y \sqrt{ x/5-5/x \sqrt{ y)12 } }$$
$\frac{\sqrt{5x-\frac{1500\sqrt{y}}{x}}y}{5}$
$\frac{\sqrt{\frac{5x}{x^{2}-300\sqrt{y}}}y\left(x^{2}+300\sqrt{y}\right)}{10x^{2}}$
