It should be written as a theory lecture. I think you can watch lectures that teach mathematical formulas on YouTube. If the entire lecture is a theory formula lecture, how will beginners enjoy it? Do you think the 4 conditions and lectures that are recommended to this person are right? I listened to it with reference to the 4th lecture, but I was still skeptical until the end, and it was such a waste of money. Are you going to listen to this paid lecture? I paid money and got really annoyed and got paid for this ridiculous lecture? I understand why there are no reviews. Please give me a refund.