NAME
App::Math::Tutor::Cmd::Natural::Cmd::Add - Plugin for addition and subtraction of natural numbers
LICENSE AND COPYRIGHT
Copyright 2010-2014 Jens Rehsack.
This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.
See http://dev.perl.org/licenses/ for more information.