how do i reduce: (n+1)! / n!                        and (2n-1)! / (2n-1)!                            

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What the heck is that?!

    (n+1)!        n!= n! × (n+1)          n!= n! × (n+1)          n!= n+1    (2n-1)!     (2n-1)!=  (2n-1)!    (2n-1)!=     1