This is LaTeX code:

[latex]
\left| \begin{array}{c c c c}
x & 1 & a & b \\
y^2 & y & 1 & c \\
yz^2 & z^2 & z & 1 \\
yzt & zt & t & 1 \\
\end{array} \right| 
[/latex]