# How do I create this bold style math?

What package or command should I use to achieve this (bolded?) style of LaTeX math?

Instead of this (regular) style. I know the color is gray in this second picture, but the style is completely different.

• Somewhat close... \documentclass{article} \usepackage{txfonts,bm} \begin{document} $\bm{\sum_{n=1}^\infty}$ \end{document} – Steven B. Segletes Aug 13 at 17:28
• @Steven B. Segletes Please post as an answer. – hesham Aug 13 at 17:53

$\displaystyle \sum_{n=1}^\infty$