(
+
3
)
+
(
+
7
)
=
____________________
(
+
8
)
+
(
+
9
)
=
____________________
(
+
10
)
+
(
2
)
=
____________________
(
+
4
)
+
(
12
)
=
____________________
(
+
7
)
+
(
8
)
=
____________________
(
15
)
+
(
+
17
)
=
____________________
(
12
)
+
(
12
)
=
____________________
(
15
)
+
(
15
)
=
____________________
(
14
)
+
(
7
)
=
____________________
(
7
)
+
(
15
)
=
____________________
(
-
3
)
+
(
-
7
)
=
-
____________________
(
-
8
)
+
(
-
9
)
=
-
____________________
(
-
10
)
+
(
-
2
)
=
-
____________________
(
-
4
)
+
(
-
12
)
=
-
____________________
(
-
7
)
+
(
-
8
)
=
-
____________________
(
-
15
)
+
(
-
17
)
=
-
____________________
(
-
12
)
+
(
-
12
)
=
-
____________________
(
-
15
)
+
(
-
15
)
=
-
____________________
(
-
14
)
+
(
-
7
)
=
-
____________________
(
-
7
)
+
(
-
15
)
=
-
____________________
(
-
3
)
+
(
+
7
)
=
____________________
(
-
8
)
+
(
+
9
)
=
____________________
(
-
10
)
+
(
2
)
=
-
____________________
(
-
4
)
+
(
12
)
=
____________________
(
-
7
)
+
(
8
)
=
____________________
(
-
15
)
+
(
+
17
)
=
____________________
(
-
12
)
+
(
12
)
=
____________________
(
-
15
)
+
(
15
)
=
____________________
(
-
14
)
+
(
7
)
=
-
____________________
(
-
7
)
+
(
15
)
=
____________________
(
+
3
)
+
(
-
7
)
=
-
____________________
(
+
8
)
+
(
-
9
)
=
-
____________________
(
+
10
)
+
(
-
2
)
=
____________________
(
+
4
)
+
(
-
12
)
=
-
____________________
(
+
7
)
+
(
-
8
)
=
-
____________________
(
15
)
+
(
-
17
)
=
-
____________________
(
12
)
+
(
-
12
)
=
____________________
(
15
)
+
(
-
15
)
=
____________________
(
14
)
+
(
-
7
)
=
____________________
(
7
)
+
(
-
15
)
=
-
8
