Math Placement Exam Questions

Sorry if this has already been asked, but I haven't been able to find what I'm looking for in any existing posts.

This year (senior) I took college Calc. 1 and am about to finish Calc. 2 through a community college. I'm about to take the math placement exam online, but I have been performing poorly on the practice tests. Many of the problems require formulas that I haven't memorized, as I usually have a formula sheet on hand in the math class I'm currently taking. The exam instructions say that no outside resources can be used on the exam, so I will not be using any formulas that I do not have memorized.

Should I study for a couple days before taking the exam, or will this place me in a class that is out of my depth? The alternative is taking the exam without any review of my current or past math classes.

Which way will place me in a class that most suited to my skills?

Just try your best on the placement exam and don't cheat on it (use the standards and rules they set) and they will place you in the class they think is right for you. That is what the placement test is for.