You seems so confusing on the Maths HKCEE that you will take part in it.As I am a F.4 student, I know that your feelings. If I were you, I must memorize the formulas, such as the area of the triangle and so on. Futhermore, I suggest you sleep earlier, so that you have good vitality. Last but not least, you must bring your calculator. Do not be so frustrated. Otherwise, you will be nervous and get low marks in it.