You are downloading the MathsFormulas AppX file v22.214.171.124 for Windows Phone. MathsFormulas is a free and useful Education app: MathsFormulas is the Source of all maths formulas. MathsFormulas is Covering almost all maths formulas with interactive graphics format.Many Places ... You can now download the offline AppX file to install & try it.
Download Locations for MathsFormulas 126.96.36.199 AppX file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline AppX 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 MathsFormulas AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.