In C # it is possible to compile runtime code externally written in C # itself and run it inside the application, without having to use some Script language.
But I've never used anything like this with Java, specifically for Android, so I'm not quite sure what to start looking for. Which language scripts would be easier to use along with Java / Android. I need it just to have the user create mathematical formulas that can interact with the objects, without having to create a new version of Apk every time a new need arises.
I know of the problems that can cause an application-integrated script interpreter, but in this case is not a problem, Apk is for internal use only then security or even possible crashes is no problem.