I have just taught myself how to use Mathmatica. The symbolic toolbox is outstanding! I have it running mass optimizations for modular rocket stages... something Matlab is (to my knowledge) unable to do symbolically , and crunching the numbers by hand takes at least 5 minutes per stage. Now I just need to figure out how to run for and do...while loops as well as filling results into a table and I'll be living large. This software ROCKS!