Editor
$\int \frac{1+x}{(2+x)^{2}} e^{x}dx$ is equal to:
Difficulty: Easy
A: 
$\frac{2+x}{e^{x}}$
B: 
$\frac{e^{x}}{2+x}$
C: 
$\frac{e^{x}}{(2+x)^{2}}$
D: 
$\frac{(2+x)^{2}}{e^{x}}$
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