texmath-0.6.7: tests/writers/munder-07.tex
\underset{\mathrm{munder\ under\ script}}{\mathrm{munder\ baseline}}=\overset{\phantom{\mathrm{fail}}}{\underset{\mathrm{munder\ under\ script}}{\mathrm{munder\ baseline}}}\underset{\mathrm{munder\ under\ script}}{\mathrm{munder\ baseline}}=\overset{\phantom{\mathrm{fail}}}{\underset{\mathrm{munder\ under\ script}}{\mathrm{munder\ baseline}}}