module ExpressionParser
Taken from lukaszwrobel.pl/blog/math-parser-part-3-implementation
Taken from lukaszwrobel.pl/blog/math-parser-part-3-implementation
Taken from lukaszwrobel.pl/blog/math-parser-part-3-implementation
Taken from lukaszwrobel.pl/blog/math-parser-part-3-implementation
Taken from lukaszwrobel.pl/blog/math-parser-part-3-implementation
Taken from lukaszwrobel.pl/blog/math-parser-part-3-implementation