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The expressin (1)/(1+(x)/(1-(x)/(x+2)...

The expressin
`(1)/(1+(x)/(1-(x)/(x+2)))div ((1)/(1-x)+(1)/(1+x))/((1)/(1-x)-(1)/(1+x))`

A

`(2x)/(x^(2)+2x+2)`

B

`(2x)/(x^(2)-1)`

C

1

D

`x^(2)-1`

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The expression (1)/(1+(x)/(1-(x)/(x+2)))-:((1)/(1-x)+(1)/(1+x))/((1)/(1-x)-(1)/(1+x))

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