well, there are some formulas, y() and r(), that need to be defined as well...you formula as such is pretty easy. what variable are you trying to resolve it to ? i think this is more of a case of "do you actually know what your formula means ?"
yeah I figured out e's value was 2.71, came back quickly to fix my dumb question, but it seems you beat me to it, well thanks alot Salford man... I might be going to Salford this year, maybe I'll see you around.... later