1 \documentclass{amsart}

     2 

     3 \newcommand{\pathtotrunk}{../../}

     4 % \input{\pathtotrunk text/article_preamble.tex}

     5 

     6 \pagestyle{empty}

     7 

     8 \begin{document}

     9 \thispagestyle{empty}

    10 

    11 \begin{align*}

    12 abc bca cab ab bc ca a b c \\

    13 x y z A u_x u_y u_z

    14 \end{align*}

    15 \end{document}