Use the rule for order of operations to simplify the expression as much as possible:
2
(
−
4
+
8
)
+
9
(
−
4
+
9
)
=
\displaystyle {2}{\left(-{4}+{8}\right)}+{9}{\left(-{4}+{9}\right)}=
2
(
−
4
+
8
)
+
9
(
−
4
+
9
)
=
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