To be honest, I was a little confused in your statements, since at first you said that you wanted to hear criticism and recommendations from other users regarding your publication. Then you said that the text was copied from another source (probably local), but in the same post you explicitly state that these calculations belong to you, once again emphasizing that the purpose of the publication is to get feedback, (otherwise why ask other users to point out your mistakes, if in the first post, the copied calculations were published verbatim).

In addition, I do not quite understand the purpose of posting handwritten calculations, since looking at these fuzzy images, it is impossible to distinguish anything. ... and how your desire to study programming relates to the topic of our conversation. To summarize, I recommend that you at least once turn your gaze to unofficial rules, since in the future you are likely to encounter much less loyal users than those who, by chance, were involved in this discussion. Good luck in your endeavors.