Many of us have made an effort to demonstrate how the suttas have these various levels of descriptions. If you don't agree that's fine, but to me it's perfectly clear from the "papanca" descriptions, and other suttas, that complex processes are broken down into simple ones, and that is a key part of bhavana as described in the sutttas since it is how the Buddha describes seeing the three characteristics, etc.
So it seems strange that you keep asking for examples. Perhaps you could explain what you see as the problem with the examples that have been given.
Furthermore, you have offered no coherent discussion of the point that has been made that thinking about a "complex concept" such as "one plus one is two" involves of a number of objects and processes. Simply saying that it is "an object of mind" is, at best, rather simplistic description.
PS: I have tried to avoid "Abhidhamma speak" since I'm interested in where these ideas can be found in the suttas. These sorts of ideas were, of course, developed in great detail in the Abhidhamma and Commentaries, so pointing out that some idea is to be found in the Abhidhamma or Commentaries is, clearly, not an argument to reject it, or a useful addition to the discussion. What would be useful would be a careful analysis of the idea in relation to the suttas on the subject.