Al

>can someone explain to me the features
(Points Math) with some example ..<

Point Math is simply Max's brilliant "FXGraph3d" script repurposed as a node.

An in depth discussion of FXGraph scripts can be found here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=6447.1

Attached is .nod file for generating Enneper surface with Points Math node.

Hope this helps
- James