I am fairly new to academic conferences. I am registered to attend (not present at) a mathematics conference (graph theory, to be specific) in about a week and a half; I recently received the agenda and, based on the topic, some of the talks seem a little "advanced" for me. I have a decent general understanding of the topic (I have an undergraduate math degree and a master's degree in computer science), but am still unfamiliar with some of the advanced topics.
What do I do in cases like this? How can one do self-study to prepare for conferences like this to make sure that you'll understand the topics?
Also, how much of the talks "should" one expect to be able to comprehend? How much is "normal" for individuals at various "levels" in the field (e.g. undergraduate students, graduate students, working mathematicians)?
I do realize that, given the short time frame, there'll probably be a limit to how much I can do to prepare for this particular conference. However, I would like to be better prepared for future conferences in this area.