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$ \left( { x }^{ 2 }-4 \right) \left( { x }+8 \right) $ is equivalent to which of the following?

$ { x }^{ 3 }+8{ x }^{ 2 }-4x-32 $

$ { x }^{ 3 }-32 $

$ { x }^{ 2 }+x+4 $

$ { x }^{ 3 }+4x-32 $