I’m not sure how to solve a problem like this and also state the excluded values.
(4n/n+4)-(5n/n-3)

After solving, we get the final expression as:

Step-by-step explanation:

Given:

                                                         =  

Now taking L.C.M,

                                                          =    

Simplify the equation in numerator,

                                                             =  

                                                             = =  

Thus, this is the required solution:  

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