Page "Polish notation" Paragraph 26

Order of operations is defined within the structure of prefix notation and can be easily determined.

One thing to keep in mind is that when executing an operation, the operation is applied to the first operand by the second operand.

This is not an issue with operations that commute, but for non-commutative operations like division or subtraction, this fact is crucial to the analysis of a statement.

For example, the following statement: