Free Download Mathematicus 4.9.0.1 XAP for Windows Phone
Free Education App by Ronak Manglani

You are downloading the Mathematicus XAP file v4.9.0.1 for Windows Phone. Mathematicus is a free and useful Education app: Don't spend time to write down math formulas ever again!Mathematicus is the source of all math formulas you may need, covering many important ... You can now download the offline XAP file to install & try it.
Download Locations for Mathematicus 4.9.0.1 XAP file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Mathematicus XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.