A reverse Polish expression is an expression written in reverse Polish notation, with each operator following its operands. For example, 3 4
+ represents 
.
Reverse Polish Expression
See also
Reverse Polish NotationExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Reverse Polish Expression." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/ReversePolishExpression.html