That only works if everyone agrees with you, which is clearly not true.
In academic math, there’s a thing called juxtaposition. It mostly exists because math people are lazy, so instead of putting parentheses around statement e.g. 5+(2*x) they’ll just write 5+2x.
This is fine as long as you know the context of that expression. If you take it out of the context and just ask any person what is the right order of operations - it becomes ambiguous. Because some people know PEMDAS. And other people know that PEMDAS is just a simplification for middle school, when real math notation is messy, non-standard and requires a lot of local domain knowledge.
I picked example without confusion on purpose, because most people will generally avoid patterns similar to what OP posted. But if you want something more ambigious:
This is clearly
5/(2 * (a+9)). If we write this the form that the OP uses:5/2(a+9)- it’s fucked beyond all recognition.