% arara: foo: {
% arara: --> a: b,
% arara: --> c: d,
% arara: --> e: f
% arara: --> }

% My foo directive
% arara: foo: {
% takes a parameter a with value b,
% arara: --> a: b,
% a parameter c with value d,
% arara: --> c: d,
% and a parameter e with value f,
% arara: --> e: f
% arara: --> }
% but it will only be executed
% arara: --> if
% if the .tex file is changed
% arara: --> changed('tex')

import java.nio.charset.Charset
import java.util.concurrent.TimeUnit

config = [
	rule_paths : [
		"/home/paulo/Documentos",
		"/opt/paulo/rules"
	],
	file_patterns : [
		[
			extension : "tex",
			pattern : "\\s*%\\s+"
		],
		[
			extension : "dtx",
			pattern : "\\s*%\\s+"
		]
	],
	directive_charset : Charset.forName("UTF-8"),
	maximum_number_of_loops : 10,
	halt_on_error : false,
	database_name : "araradb",
	log_name : "araralog",
	timeout : 10,
	timeout_unit : TimeUnit.SECONDS,
	verbose_mode : true,

when I want to write product in latex, in some occasions the initial value and the limit value will not remain in the bottom and top of the product sign.
like this

\documentclass{article}
\usepackage{amsmath}
\begin{document}
begin{align*}
\begin{cases}
\sum_ {l_{1},l_{k}}^{m_{{\rm I}_{i1}},m_{{\rm I}_{iK}}}= \sum_{l_{1}=0}^{m_{{\rm I}_{i1}}-1} \cdots \sum_{l_{k}}^{m_{{\rm I}_{iK}}-1},\cr\kappa_{n,l}=\prod_{k=1}^{K}(-1)^{n_{k}}{m_{{\rm I}_{ik}}^{n_{k}(l_{k}+1)-1}\over \left(l_{k}!\mu_{{\rm I}_{ik}}^{l_{k}}\right)^{n_{k}}},\cr B_{n}=\sum_{k=1}^{K}n_{k}{m_{{\rm I}_{ik}}\over \mu_{{\rm I}_{\max_{k}}}},\cr A_{n,l}= \sum_{k=1}^{K}l_{k}n_{k},
\end{cases}
\end{align*}

! Missing $ inserted.
<inserted text>
                $
l.5 \begin{cases}

?

Package amsmath Warning: Foreign command \over;
(amsmath)                \frac or \genfrac should be used instead
(amsmath)                 on input line 6.

! Missing $ inserted.
<inserted text>
                $
l.7 \end{cases}

\sum_ {a,b}^{c,d}(x)= \sum_{a=0}^{c-1} \cdots \sum_{b}^{d-1} (x),\\

\documentclass{article}
\usepackage{tikz}
\usepackage{pgfplots}
\pgfplotsset{compat=1.10}
\begin{document}
\begin{figure}
\begin{tikzpicture}
\begin{axis}[
    axis lines=left,
    xmin = 0, xmax = 4,
    ymin = 0, ymax = 4,
    xticklabel=\tick,
    xtick={1,3},
    ]

   \draw[ultra thin, dashed] (axis cs:3,0) -- (interpb);
\end{axis}
\end{tikzpicture}
\end{figure}
\end{document}

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