texmath-0.6.7: tests/writers/binomial_coefficient.tex
\mathrm{C}({n},{k})={\mathrm{C}}_{{k}}^{{n}}={}_{{n}}{\mathrm{C}}_{{k}}=\binom{{n}}{{k}} =\frac{{n}!}{{k}! \,({n}-{k})!} \mathrm{C}({n},{k})={\mathrm{C}}_{{k}}^{{n}}={}_{{n}}{\mathrm{C}}_{{k}}=\binom{{n}}{{k}} =\frac{{n}!}{{k}! \,({n}-{k})!}