Since LaTeX is recommanded in VV186 and many other courses and LaTeX is unfriendly to newbies, I’m going to share my LaTeX writing style.
ShareLaTeX
ShareLaTeX is an online LaTeX editor, and even more it can compile LaTeX documents and return the PDF to you. It also enables you to collaborate with your colleagues. I cannot see any necessity to install local LaTeX environment since you can use ShareLaTeX online and be free from trouble.
Predifitions and Macros
I have used some packages, defined my own commands, and are going on. This part may be kept updating.


Commonly used tricks
Tricks noted below may require packages used above.
Aligned equations
123\begin{align*}... %equations\end{align*}and place
&
before every $=$, $<$, $>$, $\leq$, $\geq$, etc.Horstlike sectioning
1234567\begin{enumerate}\item %start a Exercise\begin{enumerate}\item %start a subquestion...\end{enumerate}\end{enumerate}Triangle over equal sign:
\triangleq
, producing $\triangleq$Conditions under quantifier:
\underset{\varepsilon > 0}{\forall}
, producing $\underset{\varepsilon > 0}{\forall}$. It works similarly for other conditions and quantifiers.Binomial coefficient:
\binom{n}{k}
, producing $\binom{n}{k}$