Mathematical Formulae

Flying is not very good in memorizing details. Subjects like history and politics have always been the worst on my scoresheet. Cheat sheets as quick references were the best friend I could every hope for, though, unfortunately, they were mostly illegal in exams back in China. It was a treat when I realized that most university exams here are open-book exams. I could make full use of cheat sheets in place of those bulky reference ‘bricks.’