If $f(x) = x^4 + x^2 + 5x$, evaluate $f(5) - f(-5)$.
Question:
If $f(x) = x^4 + x^2 + 5x$, evaluate $f(5) - f(-5)$.
Answer:
Let's think step by step.

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If $f(x) = x^4 + x^2 + 5x$, evaluate $f(5) - f(-5)$.
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