Parsing a string formula to an integer result

Question

I\'m doing some parsing work, too complex to get into details, but there\'s one simple thing I need to do (at least simple concept, maybe not simple answer). I might have a

Answer 1

List of Parsers, Mathematical Expression Evaluators, Calculators: here

[Edit] Or a TBindExpression in Delphi XE2, not sure if its apply PEMDAS