texmath-0.6.7: tests/writers/mfrac-11.tex
\frac{{A}}{{B}+\frac{{C}}{{D}+\frac{{E}}{{F}} } } =\frac{\phantom{1} {A}}{{B}+\frac{{C}}{{D}+\frac{{E}}{{F} \phantom{1}} } } \frac{{A}}{{B}+\frac{{C}}{{D}+\frac{{E}}{{F}} } } =\frac{\phantom{1} {A}}{{B}+\frac{{C}}{{D}+\frac{{E}}{{F} \phantom{1}} } }