2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/32178Main purposes of the paper are followings: 1) To show examples of the calculations in domain of QFT via ``derivative rules'' of an expert system; 2) To consider advantages and disadvantage that technology of the calculations; 3) To reflect about how one would develop new physical theories, what knowledge would be useful in their investigations and how this problem can be connected with designing an expert system.Artificial Intelligencetext