-
[
-
____________________
+
(
-
22
+
35
-
48
)
-
3
x
(
+
21
-
50
+
____________________
)
-
80
]
=
-
[
-
12
+
(
-
____________________
)
-
3
x
(
-
5
)
-
____________________
]
=
-
[
-
12
-
____________________
+
____________________
-
80
]
=
-
[
-
____________________
]
=
+
____________________
