For $n=1$, the first term of the sum will be $1^{4} - 0^{4}$. For $n=2$, the second term of the sum is $2^{4} - 1^{4}$. For $n=3$, the third term of the sum will be $3^{4} - 2^{4}$, and so on, up to the last term, which for $n=10$ is $10^{4} - 9^{4}$.
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