How do I auto-fit brackets and fractions in Latex without using \Bigg?

[squenshl]

I recently deleted my Latex code for my dissertation and now I'm starting from scratch. In my last code I had a line of code at the beginning that does all of my auto fitting for brackets, fractions etc. without having to worry about using \Bigg etc. but I can't seem to remember what it is, I have been looking all over the internet but I can't find it. Someone help please.

 

[Simon_Tyler]

If you just use \left( \right) and similarly for [ ], \{ \}, etc... then latex does the resizing for you. You don't need to write your own code for choosing the appropriate \big, \Big, \Bigg, etc...

If that's not what you mean, can you be more specific about what exactly your code did?