Whenever you try to communicate mathematical statements and ideas, you must start speaking and writing the language of mathematics. Exams and homework are also supposed to show the teacher how you think, whether you understand the concepts, and whether you’ve put enough work into mastering more mechanical skills. Here are a few pointers which should help you write better papers, and – hopefully – get better grades.
1. A page from Northern Illinois University
2. A PDF presentation from MIT
3. Mathematical writing by the legendary author Donald Knuth
4. Writing a Math Phase Two Paper – PDF from MIT