Question 775737
The necessary input is replace x with (x+h).  Do this for ALL occurrences of the standard x, not just for some of them.  


As a way to guide, leave empty space for the standard x in which to fill in the x+h:


((___)^3-2(___))/((___)+1)


That is the same expression but (*) without showing the input expression and (*) using 'underscore' just to help show the space between paired grouping symbols and (*) not included the triple-brace rendering tags.