```

% pandoc -f markdown+latex_macros -t markdown

\newcommand{\my}{\phi}

$\my+\my$

^D

$\phi+\phi$

```

```

% pandoc -f markdown-latex_macros -t markdown

\newcommand{\my}{\phi}

$\my+\my$

^D

\newcommand{\my}{\phi}

$\my+\my$

```

`\let` macros should be expanded at point of

definition, while `\newcommand` macros should be

expanded at point of use:

```

% pandoc -f latex -t latex

\let\a\b

\newcommand{\b}{\emph{ouk}}

\a

^D

\b

```

```

% pandoc -f latex -t latex

\newcommand{\a}{\b}

\newcommand{\b}{\emph{ouk}}

\a

^D

\emph{ouk}

```

```

% pandoc -f latex -t latex

\def\BDpos{}

\def\BDneg{-}

\def\beq{\begin{align}}

\def\eeq{\end{align}}

\def\e#1{\emph{#1}}

\def\f#1#2{\emph{#1--#2}}

$5\BDneg 6\BDpos 7$

\beq

x &= y\\

\eeq

\e{hi}

\f{hi}{ok}

^D

\(5-67\)

\[\begin{aligned}

x &= y\\\end{aligned}\]

\emph{hi}

\emph{hi--ok}

```

```

% pandoc -f markdown+latex_macros -t markdown

\newcommand{\my}{\phi}

\begin{equation}

\my+\my

\end{equation}

^D

\begin{equation}

\phi+\phi

\end{equation}

```

```

% pandoc -f markdown-latex_macros -t markdown

\newcommand{\my}{\phi}

\begin{equation}

\my+\my

\end{equation}

^D

\newcommand{\my}{\phi}

\begin{equation}

\my+\my

\end{equation}

```

```

% pandoc -f markdown+latex_macros -t markdown

\newcommand{\my}{\emph{a}}

\my

^D

\emph{a}

```