The determinant of a 4x4 matrix can be calculated as follows:
\[
\begin{vmatrix}
a & b & c & d \\
e & f & g & h \\
i & j & k & l \\
m & n & o & p
\end{vmatrix}
= a \cdot
\begin{vmatrix}
f & g & h \\
j & k & l \\
n & o & p
\end{vmatrix}
- b \cdot
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