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The functions $\"\"$ and $\"\"$ are odd.

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If a function is odd, then $\"\"$ .

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The composite function $\"\"$ .

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$\"\"$

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Since $\"\"$ is an odd function, $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Therefore, the composite function $\"\"$ is odd.

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$\"\"$ is odd.