RPN Converter

RPN Converter is a very handy mathematical tool - a converter from Reverse Polish Notation(postfix notation/ONP) to standard infix notation and the other way round.

The input expression can be entered with both numbers and symbols, the latter of which may be interpreted as either function symbols, when the word is three letters long, or values, in other cases. E.g the expression "sin(x)" will be interpreted as the value of the function sin for value x, Meanwhile "abcd+cd" will be interpreted as a sum of two values symbolized by abcd and cd.

The application takes into acount the unar operator "-" as well as multiplication operator ommission in cases when the context is clear.