I plan to post many answers I worked out from professor-assigned problems in Dummit & Foote, an algebra textbook. Many are difficult, and I am not sure whether I am correct; this is the reason I want to post online. If I have time and perseverance to do this, there will be about 100 problems. It is my intention that it might be helpful to others to post my answer online, in order that it may be visible to Google.
I will not mechanically copy some solution manual; in fact there is no solution manual, as far as I can see. If there are people who agree with my answer by upvoting or comment, and I myself am also assured I am right, then I will choose my own solution. If another person posts a solution and points out that I am wrong, and I realize that I really am wrong, then of course I will choose his or her solution.
I have seen Can I answer my own questions, even if I knew the answer before asking? and What are limitations on self-answered questions?, but I think the situation is somewhat different.
First, it is remarked in the "Self answer" help article that it is okay to answer one's own question, but it suggests that the asker tick the checkbox to specify that it is a self-answered question, which I shall not do. I will, however, probably end up selecting my own answer. Will these be considered a kind of "junk behavior" and my account frozen or disabled, as the moderators might think I am kind of making Math.SE my personal repository, competing with really useful information for others?
Second, is it really okay to post many questions from the same book, or will the moderators suppose that I am affiliated with the book for advertisement, or that I should have done that in a class-related website?
This is not Math.SE-specific, since the same thing may be applied to Physics.SE, Cross Validated and so on.