A puzzling MathJax x Github bug Markdown in question A $B$ C $(D)$ renders as A $B$ C $(D)$ Variations Oddly, if you leave out A B or C, it works fine $B$ C $(D)$ A C $(D)$ A $B$ $(D)$ Other examples A $B$ C $D)$ A $B$ C $(D$ A $B$ C $D$