You are given an array of strings tokens that represents an arithmetic expression in a Reverse Polish Notation. Evaluate the expression. Return an integer that represents the value of the expression.

Abstract: We present an algorithm that correctly updates the Forsyth-Edwards Notation (FEN) chessboard character string after any move is made without the need for an intermediary array representation ...

A brief account is given of a notational device that is very useful in the formal representation of syntaxes, string relationships and string transformation procedures and also of computing procedures ...

I am trying to use the JsonTypeInfo.Id.DEDUCTION method which is described here and in a lot of other sources with JSON inputs which are an array, can have 3 different forms and looks like the ...