Implicit Differentiation with Product Rule

$\frac{2*x*y-1}{x^2+e^y}$

$\frac{1+2*x*y}{x^2+e^y}$

$\frac{1-2*x*y}{x^2+e^y}$

$\frac{1-2*x*y}{x^2-e^y}$