What should I do if a professor says she doesn't understand my questions in office hours?

I am having difficulties in math, and every time I try to go to my math professor's office hours she always seems annoyed. When I ask her a question she always says something to the effect "I don't understand what you are asking," I understand being precise with math but it's as if she purposely feigns confusion. I can ask a professor a math question in another one of my classes who barely speaks English and he seems to understand what I mean just fine. In short, this prof always talks down to me and is rude, I am struggling with the math, and am just trying my best to understand it. What should I do in this situation?