Hi to all in Physics Forums. I have been a long-time "lurker" in these forums and finally decided to register as my finals draw near and I am needing help in studying for my classes, namely Linear Algebra and Electromagnetism. I have a few days before my finals for my classes and will be posting questions and hopefully find help here. My name is Calvin and I'm a sophomore studying Electrical Engineering in a university, and this semester is crucial to me, as I have gotten bad grades in the past and I need to not just pass by get above a C/B on my finals just to stay in the university. In the past this forum has been extremely helpful and always quietly helped me on the side. When I did google searches and this website always came up and I only stayed briefly because the answers I found here were so great and concise. So thanks all the help to individual people and this forum in general, and it's nice to meet you all. Do you guys have last day study tips? Better yet, can you throw me one really challenging, complex problem that you remember doing and found helpful, just to make sure I know what I need?