new section

tools/cleanup.js

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+module.exports = function cleanUp(latex) {
+  // strip any \[ and \], which is an block-level LaTeX markup indicator for MathJax:
+  latex = latex.replace(/^'/,'').replace(/'$/,'').replace('\\[','').replace('\\]','');
+
+  // also unindent the LaTeX.
+  var indent = false;
+  var lines = latex.split('\n').filter(function(line) { return !!line.trim(); });
+  var clean = function(line, idx) {
+    if(line.trim()) {
+      if (!indent) {
+        var matched = line.match(/^(\s+)/);
+        if (matched) {
+          indent = matched[0];
+        }
+      }
+      if (indent) {
+        lines[idx] = line.replace(indent,'').trim();
+      }
+    }
+  }
+  lines.forEach(clean);
+  latex = lines.join('\n');
+  return latex;
+};