After installing new Linux and new TL 2025, I am finding problem with how math is centered in longtable. I do not think I changed anything myself but not sure now. I found this compiling the code on the new PC under Linux.
But Either way, below is a MWE showing the problem I am having now.
I need to put equations inside cell in long table. But want to use breqn for this. The equations show they are way shifted below. I am using p for cells.
This example shows only two rows
\documentclass[12pt]{book} \usepackage{longtable} \usepackage{hyperref} \usepackage{breqn} \usepackage{xcolor} \usepackage{pifont} %http : // ctan.org/pkg/pifont \newcommand{\cmark}{\textcolor{blue}{\Large \ding{51}}} \newcommand{\xmark}{\textcolor{red}{\Large \ding{55}}} \usepackage[letterpaper,left=1in,right=1in,top=.9in,bottom=1in, headsep=.25in]{geometry} \begin{document} \begin{longtable}{|p{0.4in}|p{.6in}|p{4in}|p{.28in}|p{.28in}|p{.28in}|p{.28in}|} \caption{Lookup table for all problems in current section}\\\hline ID & problem& ODE &{\scriptsize Solved?}&{\scriptsize Maple}&{\scriptsize Mma}&{\scriptsize Sympy} \\\hline % \hyperref[20158]{20158}&2-1 (a)& \begin{dgroup*} \begin{dmath*} y^{\prime}=y \end{dmath*} \end{dgroup*} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark}\\ \hline % \hyperref[20159]{20159}&2-1 (b)& \begin{dgroup*} \begin{dmath*} y^{\prime}=6 y \end{dmath*} \end{dgroup*} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark}\\ \hline \end{longtable} \end{document} Compiled with lualatex gives
>lualatex A.tex This is LuaHBTeX, Version 1.22.0 (TeX Live 2025) ..... 
Is there something I am doing wrong and what to do so that the math equations are well centered inside a cell?
Also, using m instead of p for table specs did not fix the vertical alignment problem.
Update Using minipage to put the math inside helped a little. But it is still not well centered, and I am not sure this is a good solution but for now better than before.
\documentclass[12pt]{book} \usepackage{longtable} \usepackage{hyperref} \usepackage{breqn} \usepackage{xcolor} \usepackage{pifont} %http : // ctan.org/pkg/pifont \newcommand{\cmark}{\textcolor{blue}{\Large \ding{51}}} \newcommand{\xmark}{\textcolor{red}{\Large \ding{55}}} \usepackage[letterpaper,left=1in,right=1in,top=.9in,bottom=1in, headsep=.25in]{geometry} \begin{document} \begin{longtable}{|p{0.4in}|p{.6in}|p{4in}|p{.28in}|p{.28in}|p{.28in}|p{.28in}|} \caption{Lookup table for all problems in current section}\\\hline ID & problem& ODE &{\scriptsize Solved?}&{\scriptsize Maple}&{\scriptsize Mma}&{\scriptsize Sympy} \\\hline % \hyperref[20158]{20158}&2-1 (a)& \begin{minipage}{\linewidth} \begin{dgroup*} \begin{dmath*} y^{\prime}=y \end{dmath*} \end{dgroup*} \end{minipage} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark}\\ \hline % \hyperref[20159]{20159}&2-1 (b)& \begin{minipage}{\linewidth} \begin{dgroup*} \begin{dmath*} y^{\prime}=6 y \end{dmath*} \end{dgroup*} \end{minipage} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark} &\textcolor{blue}{\Large \cmark}\\ \hline \end{longtable} \end{document} Compiling gives
TL 2025
