Do you mean 'How can I graphically represent the output of these curves?' or 'How can I process these strings to turn them into the data points of the right curve?'
For the former: Lots of tiny sprites.
For the latter: I've had this problem before and wrote a parser. It was a real pain, and never worked perfectly - if you come across a better solution I'd love to hear it, hence joining this thread. Sorry I couldn't be more helpful!