texmath-0.6.7: tests/writers/munderover-09.tex
\underset{\mathrm{under}}{\overset{\mathrm{over}}{\mathrm{BASE}}}=\underset{\mathrm{under}}{\overset{\mathrm{over}}{\mathrm{BASE}}}\underset{\mathrm{under}}{\overset{\mathrm{over}}{\mathrm{BASE}}}=\underset{\mathrm{under}}{\overset{\mathrm{over}}{\mathrm{BASE}}}