I'm now using Maple 15 to get derivative funtions in a function with multiple parameters. So I want to find out the derivative w.r.t just one parameter. In the forum, I found out one way to solve this issue. 

In order to prove the correctness of the function D[3](m,n,p,r,x), I firstly use a very simple program to test it. 

In the Engineering PoA-Example.mw file, I've used a simple function called testFor with 5 parameters to generate a mathematical...