I wanted to have this task solved by expert, not by AI$.$ I asked some questions and now AI is confused. These are the questions: I still don't understand some points. How will diagrams look like? Shouldn't torques applied by P$1$ and P$2$ be substracted since these forces produce oposite torsional moment? Bending works in xy and xz plane. Is just adding these two bending moments correct? There are also some strange letters in equations. Isn't first bending moment P$1*($a$+$b$)?$ I just think the answer is wrong.