Hi,
gmaster.
If you really need this app so badly, this is what you should do (I can verify this works.):
1. Download & install the
FREE VERSION from App Store on your iPad 2.
2. Open Cydia and type the following keyword in the Search bar:
iMathematics DLC. (only available in insanelyi repo -->>
http://repo.insanelyi.com/)
3. Install iMathematics DLC. (make sure iMathematics is
not running or in the background)
4. Open iMathematics and choose to
"Restore" iMathematics.
5. Your copy of iMathematics should now be the
PRO version and all the contents including previously locked options/features will be available for you to use!
By the way, the cracked PRO versions (those available in
apptrackr.org) are really
problematic and
not recommended.
Hope this helps.