Start each problem with a clear statement of the problem. At each point in your solution explain your strategy. Intermediate steps should be logical consequences of previous steps.
Nontrivial steps require an explanation.
If two adjacent expressions are NOT equal DO NOT connect them with an equal sign. Equations cannot materialize out of thin air. If you use an equation from the text, your notes, another reference you must document it. For example, Eq. This is just like using references in a paper or lab report.