Sadly I don't have 5 reputation yet so hope this is the right place to post.
I don't understand why this question https://math.stackexchange.com/questions/402407/how-to-convert-pdf-containing-math-made-from-latex-to-word was closed. I had the same problem and spent hours getting nowhere. A search engine led me to that question, which led to my encounter with this wonderful forum and now registration. after a search engine turned up this question.
Many students and people who do math use PDF's. I'm confident they also want to know if they can add their own math equations and symbols into a PDF. The question is related to math so I want to make a request for it to be reopened. Thank you.