please help
Find \( d y / d x \) by implicit differentiation. \[ \begin{array}{c} \sqrt{x y}=x^{8} y+65 \\ d y / d x=\frac{\left(16 x^{7} \sqrt{x y}-y\right)\left(1-2 x^{7} \sqrt{x y}\right)}{x-4 x^{16} y} \end{a