Compute the value of the expression
\[ 2009^4 - 4 \times 2007^4 + 6 \times 2005^4 - 4 \times 2003^4 + 2001^4 \, .\]
Question:
Compute the value of the expression
\[ 2009^4 - 4 \times 2007^4 + 6 \times 2005^4 - 4 \times 2003^4 + 2001^4 \, .\]
Answer:
Let's think step by step.

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Compute the value of the expression
\[ 2009^4 - 4 \times 2007^4 + 6 \times 2005^4 - 4 \times 2003^4 + 2001^4 \, .\]
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