You are downloading the ComplexCalc XAP file v18.104.22.168 for Windows Phone. ComplexCalc is a free and useful Education app: This app is a simple calculator that uses complex numbers. You can add, subtract, multiply, divide complex numbers. You can also calculate 1/z, ... You can now download the offline XAP file to install & try it.
Download Locations for ComplexCalc 22.214.171.124 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 ComplexCalc XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.