Katex/Latex with Boldgrid Page Builder

Thank you for contacting us Malick, our team is happy to answer any questions you have about working with Latex code in the Post and Page Builder!

I located a plugin called WP QuickLaTex in the public WordPress repository that seems like it should give you the functionality you are looking for on your website.

After activating the plugin I pasted the example code from their Getting Started page into one of my page sections and the formulas rendered with the expected formatting. Here is the example code I used:

[latexpage]
At first, we sample $f(x)$ in the $N$ ($N$ is odd) equidistant points around $x^*$:
\[
   f_k = f(x_k),\: x_k = x^*+kh,\: k=-\frac{N-1}{2},\dots,\frac{N-1}{2}
\]
where $h$ is some step.
Then we interpolate points $\{(x_k,f_k)\}$ by polynomial
\begin{equation} \label{eq:poly}
   P_{N-1}(x)=\sum_{j=0}^{N-1}{a_jx^j}
\end{equation}
Its coefficients $\{a_j\}$ are found as a solution of system of linear equations:
\begin{equation} \label{eq:sys}
   \left\{ P_{N-1}(x_k) = f_k\right\},\quad k=-\frac{N-1}{2},\dots,\frac{N-1}{2}
\end{equation}
Here are references to existing equations: (\ref{eq:poly}), (\ref{eq:sys}).
Here is reference to non-existing equation (\ref{eq:unknown}).

This is how the formulas displayed on the frontend when previewing the page:

I hope that plugin helps you get your LaTex formulas working as expected and please let us know if there is anything else that we can do to help!