module.exports = function cleanUp(latex) {
  // strip any \[ and \], which is a block-level LaTeX markup indicator for MathJax:
  latex = latex.replace(/^'/,'').replace(/'$/,'').replace('\\[','').replace('\\]','');

  // wrap some known functor words in italics markup
  ['Bézier'].forEach(term => {
    latex = latex.replace(new RegExp(term, 'g'), '\\textit{' + term + '}');
  });

  // also unindent the LaTeX.
  var indent = false;
  var lines = latex.split('\n').filter(line => !!line.trim());
  var clean = function(line, idx) {
    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;
};