Simple question #1

Well, you can send private messages to people in the forum (not that you should go around sending strangers messages), the people you can trust the most are the moderators like; Melody, CPhill, Alan, and Radix (and me ;) You can help other users with their questions, even though you can do that as a guest too. (and have funny conersatons with forum buddies). So yeah, that's pretty much it. :)

I'm not absolutly sure, but I think it's done like this:

   a(x+y-z)

= a*x+a*y-a*z

= ax+ay-az

I think that's the answer.

I think so too. Thank you! 

you're welcome. you know, you could become a member too guest. 

I'll think about it... any perks? 

Thank you, Eloise! I will def consider it! Much appreciated.

your welcome :)