Posting a clear photograph of your work is fine, but don't post an entire past paper in one thread. The reason for this is it will probably start several parallel discussions in one thread, which tends to get incoherent.
I appreciate that without a mark scheme you have no way of knowing if your answers are right, but the forum is not intended to be a marking service. For that you are better off asking a tutor, teaching assistant etc. at your institution if they would mind having a look over your work.
Start with the reactions you posted - if you need to discuss other questions, do so in new thread(s).