Perform the indicated operations
[
(
−
6
x
2
+
10
x
+
7
)
−
(
−
26
x
2
−
7
x
+
31
)
]
−
(
16
x
2
+
9
x
−
15
)
\displaystyle {\left[{\left(-{6}{x}^{{2}}+{10}{x}+{7}\right)}-{\left(-{26}{x}^{{2}}-{7}{x}+{31}\right)}\right]}-{\left({16}{x}^{{2}}+{9}{x}-{15}\right)}
[
(
−
6
x
2
+
10
x
+
7
)
−
(
−
26
x
2
−
7
x
+
31
)
]
−
(
16
x
2
+
9
x
−
15
)
Ans =
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