42. Find the algebraic complements of the elements $a_{13}, a_{21}, a_{31}$ of the determinant

$$
D=\left|\begin{array}{rrr}
-1 & 2 & 3 \\
2 & 0 & -3 \\
3 & 2 & 5
\end{array}\right|
$$
$$
\begin{gathered}
A_{13}=(-1)^{1+3}\left|\begin{array}{ll}
2 & 0 \\
3 & 2
\end{array}\right|=\left|\begin{array}{ll}
2 & 0 \\
3 & 2
\end{array}\right|=4-0=4 \\
A_{21}=(-1)^{2+1}\left|\begin{array}{ll}
2 & 3 \\
2 & 5
\end{array}\right|=-\left|\begin{array}{cc}
2 & 3 \\
2 & 5
\end{array}\right|=-(10-6)=-4 ; \\
A_{31}=(-1)^{3+1}\left|\begin{array}{cc}
2 & 3 \\
0 & -3
\end{array}\right|=\left|\begin{array}{cc}
2 & 3 \\
0 & -3
\end{array}\right|=-6-0=-6
\end{gathered}
$$