\input{umtest-preamble} \usepackage{unicode-math} \setmathfont{Cambria Math} \begin{document} \[ \left| \left| \left| \left| \left| \left| x^2 \right|^2 \right|^2 \right|^2 \right|^2 \right|^2 \right| \] \[ \left\vert \left\vert \left\vert \left\vert \left\vert \left\vert x^2 \right\vert^2 \right\vert^2 \right\vert^2 \right\vert^2 \right\vert^2 \right\vert \] \end{document}