first, what is your site address?
make donate with Paypal available
Your visitor should coming from US,Russia,German or western
consider to use flattr.com and Google adsense(many developer use it)
-5 karma · joined November 24, 2014
Your visitor should coming from US,Russia,German or western
consider to use flattr.com and Google adsense(many developer use it)
http://www.lulu.com/shop/ivan-savov/no-bullshit-guide-to-mat...
world.mathigon.org
mathworld.wolfram.com
good luck!
I think you have(like drawing,painting,etc).
I ever felt like this before I'm a painter but suddenly I like philosophy.
And now i hate painting!