Evaluate
|x||x+6|x^{3}|6x^{3}-2x+9|
Differentiate w.r.t. x
|x|x^{2}\left(2x|x+6|\left(9x^{2}-1\right)sign(6x^{3}-2x+9)+xsign(x+6)|6x^{3}-2x+9|+4|x+6||6x^{3}-2x+9|\right)
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