Comment 3 for bug 1788181

This description for the backend package says:

 cantor-backend-maxima: Maxima backend for Cantor

     Cantor is an application to allow you to you use your favorite mathematical
     applications from within an elegant worksheet interface. It provides dialogs
     to assist with common tasks and allows you to share your worksheets
     with others.
     .
     This package provides the backend for using the Maxima Computer Algebra System
     (http://maxima.sourceforge.net) in Cantor.
     .
     NOTE: currently this package only contains the maxima icon as the backend
     itself is broken with the current version of maxima. The backend will be
     restored once an upstream fix is available.
     See KDE BUG: https://bugs.kde.org/show_bug.cgi?id=379404

This should be re-enabled shortly in 19.04, but testing will be desirable.