Perform the indicated operation and simplify:
(
4
x
+
5
)
(
16
x
2
−
20
x
+
25
)
\displaystyle {\left({4}{x}+{5}\right)}{\left({16}{x}^{{2}}-{20}{x}+{25}\right)}
(
4
x
+
5
)
(
16
x
2
−
20
x
+
25
)
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