According to the information found on the Mathemagic website, they recommend visiting another website to obtain an activation code for 16.93$. Unfortunately, that website they've recommended is not working as well which makes it impossible to acquire a new code to activate the application.
All the websites I have checked aren't working anymore. There was a problem and the domains have been suspended/expired.
I have also searched for alternative applications, but there aren't any.
As a recommendation, try checking the following website: http://itutorworld.com.au/