The New York Times (https://www.nytimes.com/2019/08/02/science/math-equation-pedmas-bemdas-bedmas.html?utm_source=pocket-newtab) ran a story about it.
The author (Prof. Steven Strogatz) state: ” The question above has a clear and definite answer, provided we all agree to play by the same rules governing “the order of operations.” When, as in this case, we are faced with several mathematical operations to perform ”
This is clearly in-line with Math4Teens approach to math. This is a second language. Like any language, without agreeing on the punctuation and grammar, it will be extremely hard to express ourselves without ambiguity. An article worth reading even if you are not interested in math.