I was afraid of math in the past 24 years and I always drown into the thought that I do not have the suitable mind for math. For grades, it is. I have never won a good score in any examination of math. But math is important, without which the modern world is closed for me. So I decided to learn math from the bottle.
I found it is nesessary to write some notes during the learning of math. And this is the recordings.