

$\int$  $dfdf$

If `poly-markdown.el` is loaded. This should work by default. Otherwise `M-x
poly-markdown+r-mode RET` should do the job.


$$%


$$

```r
1 + 1
```

```r
## [1] 2
```

```r
 0.4 - 0.7 + 0.3  # what? it is not zero!
```

```r
## [1] 5.551e-17
```

```emacs-lisp
(message  "it works")
```

```javascript
{
    
}
```

Some text

$$ 
\int{}
$$


$$  
\int_a^b f(x) dx 
$$


$$  $$
 
 $\int{a+b}$  $p +$ 

Some text


```python
    "some text with $ddd$ dfd"
    if len(\$declaration) > 0 and \$declaration::isTypedef:
        \$Symbols::types.add(\$IDENTIFIER.text)
        print "define type "+\$IDENTIFIER.text  # line 19
```
  
  
$$\begin{equation}
  L(\theta) = f(x_1,x_2, \ldots, x_n | \theta )
  (\#eq:reference)
\end{equation}$$

