# How to boldify math equation and plain text simultaneously

We can boldify math equations using \mathbf{} and normal text using \textbf{}.

Suppose I want to boldify a line which contains both normal text and mathematical part simultaneously using a single command. Is it possible?

Let us consider the following example:

                          Since $s=9, s*s$ becomes 81


I have to do as follows

             \textbf{Since} $\mathbf{s=9, s*s}$ \textbf{becomes} 81


Instead of this, is there any newtag, that make whole text bold?

• Do you want letters and symbols to be bold while in math mode, or just the letters? (\mathbf works only on letters.) – Mico Feb 29 '16 at 7:37
• The input is incorrect: Since $s=9$, $s*s$ becomes 81. You need two formulas, not one. – egreg Feb 29 '16 at 9:28

Yo can apply \boldmath:

Surrounding it with {...} limits the scope to be just within the curly braces so subsequent text is not effected.

## Notes:

• As per egreg's suggestion I have replaced $s=9, s*s$ with $s=9$, $s*s$. The , is not really part of the math, thus, it should be outside. This yields better spacing.

## Code:

\documentclass{article}
\begin{document}
Since $s=9$, $s*s$ becomes 81

{\bfseries\boldmath Since $s=9$, $s*s$ becomes 81}

Since $s=9$, $s*s$ becomes 81

\end{document}

• Could you please change the code $s=9, s*s$ into $s=9$, $s*s$? – egreg Feb 29 '16 at 9:29
• @egreg: Good point. Have corrected. – Peter Grill Feb 29 '16 at 9:51

Run with lualatex or xelatex

\documentclass{article}
\usepackage{unicode-math}
\setmathfont{xits-math.otf}
\setmathfont[version=bold]{xits-mathbold.otf}
\newcommand\allBold[1]{{\bfseries\mathversion{bold}#1}}
\newcommand\allbold[1]{{\bfseries\boldmath#1}}
\begin{document}

Since $s=9, s*s$ becomes 81 $\displaystyle\int_a^b f(x)\mathrm{d}x$

\allbold{Since $s=9, s*s$ becomes 81 $\displaystyle\int_a^b f(x)\mathrm{d}x$}

\allBold{Since $s=9, s*s$ becomes 81 $\displaystyle\int_a^b f(x)\mathrm{d}x$}

Since $s=9, s*s$ becomes 81 $\displaystyle\int_a^b f(x)\mathrm{d}x$
\end{document}
`