You should first review the material that you need. You need to know that the time for the test is already two weeks away. Therefore, if you do not want to spend more time studying, make sure that you start reviewing early enough. As soon as you have a review schedule ready, it will be easier to manage and structure your time well. Thus, it will allow you to set your focus and become better prepared.
Secondly, review the topics that you have learned with your teacher. Before going to the calculators, you should already have an idea on the concepts taught so that you will not have a hard time reviewing the necessary materials. For instance, knowing the formulas for integration and derivatives can really help you if you do not understand them well.
Thirdly, before taking the actual exam, practice using the calculator. This includes the basics such as working out the area of a quadratic equation and finding the roots of a cubic equation. Once you feel confident enough to use the calculator, you can start to take the actual test. Of course, it would help if you can work through the problems one at a time so that you do not have to do it all in one go.
Fourthly, before going to the calculator, review the topics taught in the textbook. If you are a fresh law student, it may be helpful to read the material on your own first before using the calculator. Reading the text and familiarizing yourself with its concepts can also help you prepare for the exam. After all, it is very easy to get caught up in studying but forgetting the stuff that you need to study.
Fifthly, before your exam, review the topics that you are weak in. You might have some areas that you need more time to grasp so it would be better if you can review these topics prior to the exam. If you know that you need to grasp the concepts quickly, you may just want to use the calculator until you get the hang of it. It is not advisable to waste too much time using a calculator that is less than top-notch.
Finally, before you do the actual exam, review the topics that you were weak in. Again, this is because of the misconception that you need to use a calculator in order to do the math. Of course, using a calculator will help you get through the entire test. However, it is not necessary to spend too much time doing this. A calculator is only meant to make things easier for you. As such, it is not a necessity to make sure that you have a calculator at hand during your review sessions.
So, in sum, it will be best for you to do the above mentioned things. First, you should focus on getting prepared for the test the right way. Second, do not spend too much time using your calculator before the exam. Finally, you should do your best to review all the topics that you were weak in during the previous review session. By doing so, you will not have to face any problems when the time for the actual exam comes. Good luck!