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Correct answer
$\qquad\dfrac{df(x)}{dx}$ =
$- 20 x^{4} - 9 x^{2} - 2 x - 7$
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Started at:
2026-08-04 22:48:57 (CDT)
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{
"df": "-20*x**4 - 9*x**2 - 2*x - 7"
}