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Simplify this complex fraction:

`3/(2/x+5)`
 

Simplify the expression
`\frac(1+\frac(1)(c-1))(1-\frac(1)(c-1))`
into a single fraction.

The numerator of your answer is :  
The denominator of your answer is :  

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Simplify the complex rational expression:

`(4-4/x)/(x-1/3)`
 

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