# Increase in the size of nested parenthesis with \left and \right [duplicate]

I want to obtain an increase in the size of nested parenthesis with a single command like \left and \right, something like the right term of

but using the code used for the left term.

(The image is created using \left(1 + \left(f(x),g(x)\right)\right) and \Big(1 + \big(f(x),g(x)\big)\Big))

I could simply use \bib, \Big, ... but I don't want to keep track of the content all the time.

I have no clue how to define a new set of \left and \right for this purpose.

• I believe that there is no need at all to increase the size; maybe you can use \bigl( and \bigr) for the outer parentheses. Size \Big is definitely excessive. – egreg Jul 15 '20 at 12:19
• @egreg I have some commands with \left and \right, I can't use \bigl and \bigr if the content has a \frac for example, I want to respect that but always getting a but larger parenthesis that the one the normal \left would give. – Jorge E. Cardona Jul 15 '20 at 13:04
• @oliversm It does, adding this \delimiterfactor=1001 is enough to obtain my desired effect, I will play with the other quantities to see what else do I get. Thanks! – Jorge E. Cardona Jul 15 '20 at 13:14