[NTG-context] AMS-like matrices

All, Are there nath, newmat, amsl constructs that do the following: %matrix wrapped in parentheses () \begin{pmatrix} 1&2&3&4\\ 5&6&7&8 \end{pmatrix} %matrix wrapped in brackets [] \begin{bmatrix} 1&2&3&4\\ 5&6&7&8 \end{bmatrix} %matrix wrapped in curly braces {} \begin{Bmatrix} 1&2&3&4\\ 5&6&7&8 \end{Bmatrix} %matrix wrapped in absolute values || good for determinants \begin{vmatrix} 1&2&3&4\\ 5&6&7&8 \end{vmatrix} %matrix wrapped in || || good for magnitude of a vector \begin{Vmatrix} 1&2&3&4\\ 5&6&7&8 \end{Vmatrix}