This command comes through as regular text:
```
% pandoc -f latex+raw_tex -t native
\maketitle
^D
[ RawBlock (Format "latex") "\\maketitle" ]
```


```
% pandoc -f latex -t native
\maketitle
^D
[]
```

```
% pandoc -f latex -t rst
\maketitle
Hello.
^D
Hello.
```