@ -104,7 +104,7 @@
\section*{7}
\subsection*{7.1}
$$v1 = (137, 312), v2 = (215, −187)$$
$$v1 = (137, 312), v2 = (215, -187)$$
$$mat = \begin{pmatrix}
137 & 312 \\
215 & -187 \\
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