return MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACLEFT));
if (s == "cfracright")
return MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACRIGHT));
+ if (s == "case") // TODO: only if class is aastex(6|62)
+ return MathAtom(new InsetMathFrac(buf, InsetMathFrac::AASTEX_CASE));
//if (s == "infer")
// return MathAtom(new MathInferInset);
if (s == "atop")