Hello @filipesaraiva , I started the port of Qalculate. I have created a diff here https://phabricator.kde.org/differential/diff/15019/
At the moment I am just concentrating on establishing connection with the back end, hence I have disabled the support for extensions, completion etc.
The application will produce SIGSEV if given an expression to solve , only for Qalculate.
Next I plant to add support for expression evaluation