Add, using the rule for order of operations if necessary:
8
+
(
−
15
)
+
[
5
+
(
−
2
)
]
=
\displaystyle {8}+{\left(-{15}\right)}+{\left[{5}+{\left(-{2}\right)}\right]}=
8
+
(
−
15
)
+
[
5
+
(
−
2
)
]
=
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