You are downloading the Math Tutor Pro XAP file v188.8.131.52 for Windows Phone. Math Tutor Pro is a free and useful Education app: Math Tutor is an educational application for kids to do basic math operations such as addition, subtraction, multiplication, division, word problems, ... You can now download the offline XAP file to install & try it.
Download Locations for Math Tutor Pro 184.108.40.206 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Math Tutor Pro XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.