Apk read external script and runs it

Question

In C# it is possible to compile at runtime external code written in C# and run it inside the application, without having to use some Script language.

But I’ve never used anything like this with Java, more specifically for Android, so I’m not sure what to start looking for. Which Scripts language would be easier to use along with Java/Android. I only need it to have the user be able to create mathematical formulas that can interact with objects, without having to create a new version of Apk every time a new need arises.

I know of the problems that can cause a script interpreter integrated into the application, but in this case is not a problem, the Apk is for internal use only so safety or even possible crashes is no problem.