texmath-0.6.7: tests/writers/mfracZcomp-29.tex
\mathrm{Displayed\ nested\ fractions\ are\ normal\ size\ at\ the\ first\ level,~}\frac{{1}^{\sqrt{6}}}{\sqrt{2}+\frac{1}{\sqrt{3}+\frac{1}{\sqrt{4}+\frac{1}{\sqrt{5}+\frac{1}{\sqrt{6}+{\ldots }} } } } } \mathrm{~script\ size\ at\ second\ level,\ and\ script-script\ size\ at\ all\ more\ nested\ levels.}