texmath-0.6.7: tests/writers/msubsup-09.tex
{{M}}_{{{B}}_{4}^{3}}^{{{T}}_{2}^{1}}={{M}}_{{{B}}_{\underset{\phantom{\mathrm{0}}}{4}}^{3}}^{{{T}}_{2}^{\overset{\phantom{\mathrm{0}}}{1}}}{{M}}_{{{B}}_{4}^{3}}^{{{T}}_{2}^{1}}={{M}}_{{{B}}_{\underset{\phantom{\mathrm{0}}}{4}}^{3}}^{{{T}}_{2}^{\overset{\phantom{\mathrm{0}}}{1}}}