equation environment:
.
\begin{equation}
a = 1
\end{equation}
.
\begin{equation}
a = 1
\end{equation}
.
equation* environment:
.
\begin{equation*}
a = 1
\end{equation*}
.
\begin{equation*}
a = 1
\end{equation*}
.
multline environment:
.
\begin{multline}
a = 1
\end{multline}
.
\begin{multline}
a = 1
\end{multline}
.
multline* environment:
.
\begin{multline*}
a = 1
\end{multline*}
.
\begin{multline*}
a = 1
\end{multline*}
.
gather environment:
.
\begin{gather}
a = 1
\end{gather}
.
\begin{gather}
a = 1
\end{gather}
.
gather* environment:
.
\begin{gather*}
a = 1
\end{gather*}
.
\begin{gather*}
a = 1
\end{gather*}
.
align environment:
.
\begin{align}
a = 1
\end{align}
.
\begin{align}
a = 1
\end{align}
.
align* environment:
.
\begin{align*}
a = 1
\end{align*}
.
\begin{align*}
a = 1
\end{align*}
.
alignat environment:
.
\begin{alignat}
a = 1
\end{alignat}
.
\begin{alignat}
a = 1
\end{alignat}
.
alignat* environment:
.
\begin{alignat*}
a = 1
\end{alignat*}
.
\begin{alignat*}
a = 1
\end{alignat*}
.
flalign environment:
.
\begin{flalign}
a = 1
\end{flalign}
.
\begin{flalign}
a = 1
\end{flalign}
.
flalign* environment:
.
\begin{flalign*}
a = 1
\end{flalign*}
.
\begin{flalign*}
a = 1
\end{flalign*}
.
equation environment, with before/after paragraphs:
.
before
\begin{equation}
a = 1
\end{equation}
after
.
before
\begin{equation}
a = 1
\end{equation}
after
.
equation environment, in list:
.
- \begin{equation}
a = 1
\end{equation}
.
.
`alignat` environment and HTML escaping
.
\begin{alignat}{3}
& d = \frac{1}{1 + 0.2316419x} \quad && a_1 = 0.31938153 \quad && a_2 = -0.356563782 \\
& a_3 = 1.781477937 \quad && a_4 = -1.821255978 \quad && a_5 = 1.330274429
\end{alignat}
.
\begin{alignat}{3}
& d = \frac{1}{1 + 0.2316419x} \quad && a_1 = 0.31938153 \quad && a_2 = -0.356563782 \\
& a_3 = 1.781477937 \quad && a_4 = -1.821255978 \quad && a_5 = 1.330274429
\end{alignat}
.
`alignat*` environment and HTML escaping
.
\begin{alignat*}{3}
& m \quad && \text{módulo} \quad && m>0\\
& a \quad && \text{multiplicador} \quad && 0
\begin{alignat*}{3}
& m \quad && \text{módulo} \quad && m>0\\
& a \quad && \text{multiplicador} \quad && 0<a<m\\
& c \quad && \text{constante aditiva} \quad && 0\leq c<m\\
& x_0 \quad && \text{valor inicial} \quad && 0\leq x_0 <m
\end{alignat*}
.