Question about tooltips.

Alright. I will be the first to admit I am not the most technologically advanced. I am attempting to use tooltips to provide the exact modifier and bonus numbers that players roll when playing a homebrew class of mine. For example, I want it to look like (Strength Mod) + (Proficiency Bonus), where () indicates where a number should be. I am unsure if my goal is even possible, but would very much appreciate any help if it can in fact be done.

I try to make my homebrew items, classes, and spells as easy to understand as possible, and I believe this would help that slightly.