If there are people who are satisfied with the previous lectures and think they have to buy this, I do not recommend it. Personally, I am not very satisfied with the previous parts, so I cannot give a good evaluation, but I got the lecture through an event and watched it, and there are some questions that are wrong in solving past exam questions, the answers are written incorrectly, and the explanations are strange. I recommend that you study by watching this and not get the right questions wrong, and buy a past exam book or find a genealogy on the Internet and study it. It is strange to listen to the explanations in the lecture when you check the answers and get them wrong or the answers are strange, but it is strange to skip them and watch them. For example, the strange parts of the lecture... 1. Solving the problem correctly and checking the wrong answer. The correct answer is number 2 in the explanation, right? And check the answer for number 3 2. In the question of finding the wrong answer in the following options, option 1 is correct, option 2 is wrong (check the correct answer), option 3 is wrong (.....? 2 wrong?) Is option 4 correct? In this case, there are cases where there should be only 1 wrong answer but they say there are 2 wrong and move on naturally. Even if you don't know anything about the class content, the lecture is strange. In the first part of the solution to past questions, the 32nd problem, I wondered if the reason I got the question wrong was because I didn't study enough and got it wrong, if the instructor got the explanation or the answer wrong, if I accidentally checked the answer wrong, or if there was a typo in the question or option that made it unsolvable. It was a waste of time and tiring to find the cause by looking up past questions. I think it would be more efficient to study with proper past questions.