Coding. Parentheses are used to align reader, writer, and machine to the same, single purpose, which typically results in clearer code - except if you Lisp.
References:
[1] XKCD: https://xkcd.com/297/
[2] History of Parentheses in Coding: http://www.gavilan.edu/csis/languages/parentheses.html
[3] Wumpus in Lisp: http://landoflisp.com/wumpus.lisp
Parentheses are put into expressions so that reader, writer, and machine can be aligned to the same, single purpose. This usually improves code clarity. Except when you Lisp. https://xkcd.com/297/