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  tex2jax: { inlineMath: [ ['$', '$'], ['\\(','\\)'] ], displayMath: [ ['$$','$$'], ['\\[', '\\]'] ], processEscapes: false },
  TeX: { noUndefined: { attributes: { mathcolor: 'red', mathbackground: '#FFEEEE', mathsize: '90%' } } },
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