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Simplify this complex fraction:

`(4/x+3)/3`
 

Simplify the expression
`\frac(1+\frac(6)(c-6))(1-\frac(6)(c-6))`
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:

`(1+2/x)/(x+1/5)`
 

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