For this case, there are two strategies that Casey can use for the exam.
1) Make a form: This technique consists of compiling the most important formulas found in the book and writing them on a single page. Then, when Casey must use a formula in the exam, it is easier for her to look in the sheet where she wrote the formulas.
2) Highlight formulas: This technique consists of using a highlighter to highlight the most important formulas in the book. So when Casey should look for a formula in the book, she should not read the whole text. She should only read the highlighted text.