There are two parties
You need professional help.
If you start using for complicated document, you will need professional help.
LaTeX provides styles for writing
\documentclass{article}
\begin{document}
blah blah bluhm $\alpha^2 + \int f(x) dx$
\end{document}
\begin{equation}
E = m c ^2 \label{eq-mass-energy}
\end{equation}
...
From \emph{Einstein's equation of mass} and energy \ref{eq-mass-energy} we
can calculate the energy in the reactor
Inline using $(\alpha + \beta)^2$
Display math
\[
\sum_{i=1}^n i = \frac{n (n - 1)}{2}
\]
\begin{equation}
E = m c ^2 \label{eq-mass-energy}
\end{equation}
amssym
, amsthm
, amsmath
)tikz
/pgf
: High quality vector graphicsarticle
report
, book
letter
beamer
: presentationsn0bee
mistakeslabeling equations as eq-1 eq-2 etc
confusing \emph
and \it
or $$
Commas in document and math
Let $U$, $V$ and $W$ be three vector spaces.
instead of
Let $U,V$ and $W$ be vector spaces.