\[\boxed{\mathbf{70}.}\]
\[1)\ y( - 3) = - 1;\]
\[y( - 5) = - 2;\]
\[y(0) = 3;\]
\[y(2) = 4;\]
\[y(7) = 0;\]
\[y(12) = - 3.\]
\[2)\ y(x) = - 1\ при\ \]
\[x = - 3;x = 8.\]
\[y(x) = 0\ при\ x = - 2;x = 7.\]
\[3)\ y > 0\ при\ x \in ( - 2;7);\]
\[y < 0\ \ при\]
\[\ x \in \lbrack - 5;\ - 2) \cup (7;12\rbrack.\]
\[4)\ y( - 5) < y( - 2);\]
\[y( - 3) < y(7);\]
\[y(0) < y(2).\]