63.581^33 also possibly written as pow(63.581, 33) or even 63.581^(33/4) (meaning to some pow(63.581, (33/4)))
I need to use some flexible and extensible parser that users many be able to adjust/fine tune to their needs and what I want out of such parser is 4 numbers; 1 numerator a denominator and (if they are not 1) their powers