Latex can ease you from tough formating works. Simply filling in text contents to corresponding areas, LaTex would format every thing for you automatically.

$\displaystyle \mathrm{Edition\ (e)} = \sum \limits _{n=0}^{\infty }{\frac {1}{n!}} = 1 + {\frac {1}{1}}+{\frac {1}{1\cdot 2}}+{\frac {1}{1\cdot 2\cdot 3}}+\cdots = 2 ...