When I was writing, using normal parentheses, if I entered internal fractions, the parenthesis was visibly small and not beautiful.

So I tried to change the normal parenthesis to \left or \right, but each needs the other, and when the user writes the expression starting with opening the parenthesis '\left(' the system fails because it does not find the \right.
So I tried to create a button for myself, in order to create both the \left (and the \right) and let the user type in between. However, I'm not sure how to set it up, I've tried several cases but I don't understand how to do it or if it's possible.


When I was writing, using normal parentheses, if I entered internal fractions, the parenthesis was visibly small and not beautiful.
So I tried to change the normal parenthesis to \left or \right, but each needs the other, and when the user writes the expression starting with opening the parenthesis '\left(' the system fails because it does not find the \right.
So I tried to create a button for myself, in order to create both the \left (and the \right) and let the user type in between. However, I'm not sure how to set it up, I've tried several cases but I don't understand how to do it or if it's possible.