history: I studied really hard for my exam, and I think I'll do well. I put weeks of work into it, so I am pretty sure I know the material I studied really hard for my exam_comma_ and I think I'll do well! what kind of exam is it _comma_ and you sound confident you got this 
current: It's actually a Master's exam so it covers a lot of material, but I do feel I learned it well and am confident in my abilities
next: That is awesome to hear , preparation will help you knock this out like a champ