>>3023825Everyone said, each () is a 1.1x multiplier. (smile) is the same as (smile:1.1), ((smile)) is the same as (smile:1.21), etc.
I'd highly suggest using the format (tag:1.1) because it both gives you finer control of the weight (for instance, you can do (smile:1.25) whereas you can't get that weight stacking parentheses), and because it makes your prompt easier to read.
Pic related shows the equivalency.