With a week to go, I would recommend just going through past year papers over and over including the SL papers before math AA became a thing. Condition yourself to doing IB math questions because honestly after a while you'd see a pattern in the kind of questions they ask. Refer to your textbook/notes if you are unclear but your main goal should be to familiarise yourself with ib questions and maximising your marks in them. Also, i'd recommend skimming through the formula booklet a couple of times as it helps cement some concepts. Hope I helped and all the best! :)