[WARNING] Could not convert TeX math '\mathbb{Q} = \{\frac{a}{b}\ |\ a \in \mathbb{Z}, b \in \mathbb{N}, b \not= 0\}', rendering as TeX:
  mathbb{N}, b \not= 0\}
                     ^
  unexpected "0"
  expecting "%", "\\label", "\\nonumber" or whitespace