Intent
Let's break down the content of the post in question and see if we can notice anything or improve something.
I have been attacked before for not mentioning the following points. They are here in self defense.
While this can be frustrating and is an experience that most user can relate to, Stack Exchange community is huge and most likely your post will be read by people who have never interacted with you, let alone attack you in the past. As an illustration, imagine walking into a shopping mall and suddenly someone says:
"Hey, I was told not to smoke indoor before, so I left my cigars in my car."
As a stranger who didn't know you nor what happened to you in the past, my first reaction is "Cool, but why are you telling me this. Is this really necessary?"
I have several solutions to the questions, which I will provide.
Awesome! I don't see anything wrong with this.
Yes, this is a homework question.
A little aggressive because it implies that you know someone is going to call you out for posting homework question (which may happen), and that's why you put a defensive answer before someone has the chance to do so. But still completely fine.
It was asked and answered by me about $59$ years ago.
You have mentioned you have the answers, it's probably unnecessary to point out when or who answered it.
It is much too late to hand in the assignment again.
This is the point where I went "Ugh OK OK we got it, don't need to emphasize this over and over". And remember, many users wouldn't have asked if it's a homework question in the first place. If we use the smoking analogy again, it sounds like this:
"Hey, I was told not to smoke indoor before, so I left my cigars in my car. Oh, I also don't have my lighter with me so even if I wanted to, I couldn't smoke now."
For that reason, I do not feel that I am asking the readers for help doing my homework for me
Again, this is completely unnecessary. You should have stopped long time ago. At this point you are being too immersed in an imaginary debate with an imaginary community member.
This is a Combinatorics problem.
Great! We have a tag which will allow you to signify this to other users and let your problem be searched under the combinatorics tag.
I believe that such questions are permitted here.
Again with the imaginary interaction and defense.
link to the meta post about self - answering your question
Again with the imaginary interaction and defense.
Please, do not edit my questions. Comment your opinions in the comments.
This comes across as commanding and really aggressive, particularly after reading through the previous parts of the post.
Possible Improvement
You can simply state the following:
"Hi, this is an interesting problem I have solved and I wish to document it here as self-answered question"
I am quite sure most users will accept this much easier than your post opening parts. In addition, it is much shorter. In your post, the preamble takes almost as much space as the actual content.