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$\int _{ -1 }^{ 1 }{ \bigg [ \cfrac { { x }^{ 2013 } }{ { e }^{ \left| x \right| }({ x }^{ 2 }+\cos x) } +\cfrac { 1 }{ { e }^{ \left| x \right| } } } \bigg ] dx = \ ?$

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