6, Mathcad 2000, NuCalc,
13 + 23 + 33 + ... + n3 = (1 + 2 + 3 + ... + n)2 in Mathematica, Maple, and Mathcad
I now have all of the above programs ($$$!), and have started a comparison review. It's a bit like comparing Euler, Euclid, and Einstein. Each of the above links will take you to the corresponding home page for these programs. As a starter, I graphed sin(x sin(y)) = cos(y cos(x)). The results are beautiful. Mathematica's graph. Maple's graph. Nucalc's graph. GrafEQ's graph. Can Mathcad do this? I will have much more on these programs in the months to come. If you know of other mathematical software programs, please contact me.