If y= $\frac{2-x}{1+x}$, then what is the value $\frac{1}{y+1}+\frac{2y+1}{y^{2}-1}$ ?

If y= $\frac{2-x}{1+x}$, then what is the value $\frac{1}{y+1}+\frac{2y+1}{y^{2}-1}$ ?
1). $\frac{(1 x)(2-x)}{2x-1}$
2). $\frac{(1-x)(2 x)}{x-1}$
3). $\frac{(1 x)(2-x)}{1-2x}$
4). $\frac{(1 x)(1-2x)}{1-2x}$

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