texmath-0.7: tests/writers/mfracSscriptlevel15.tex
\frac{1}{2} + \frac{1}{2} + \frac{1}{1 + \frac{x}{3}} + \frac{1}{1 + \frac{x}{3}} + \frac{1}{1 + \frac{x}{3}}
\frac{1}{2} + \frac{1}{2} + \frac{1}{1 + \frac{x}{3}} + \frac{1}{1 + \frac{x}{3}} + \frac{1}{1 + \frac{x}{3}}