Mathematica is great. A maple as well. It's absolutely, as you said, mica, absolutly amazi that they know 20 years ago it could ll disintegral. Son, and the sperious expansion of these functions. I was using windows in t when i ethow old that was aeport. And so, yes, and n but the motibation is to be able to rase thro bit only directively,. Allow you to cotomos programme with the symbolic using a language that's a pretty decent language. E. Wise: "I like bythe more than the mathematical language"