\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}