um, i wrote a harry potter rap. is there somewhere on here i can post it?

আপনি can make it into a ইউটিউব video then emble the exact thing in the box (ex.link) (the last number is fake so don't click on this) or...
If আপনি have it on a (safe) website then আপনি can put a link to it in the লিঙ্ক section.

(Interesting, clicking on the link brings আপনি to উত্তর that need help as well as answered questions..., cool)

আপনি can always post it as an article. That's what I would do.