dy/dx of :

y=cos(x) / (e^x) +1

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This is what I have got so far:

Use the quotient rule, so make u=cos(x) and make v=(e^x)+1

y=u/v

dy/dx = [(e^x)+1 * -sin(x) - cos(x) * e^x ] / ((e^x)+1)^2

What do I do next?