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8*cos(x)+sin(7*x)-16*x=x^3+8

8*cos(x)+sin(7*x)-16*x=x^3+8 equation

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8*cos(x) + sin(7*x) - 16*x = x  + 8
$$- 16 x + \sin{\left(7 x \right)} + 8 \cos{\left(x \right)} = x^{3} + 8$$
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x1 = 0.0
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8*cos(x)+sin(7*x)-16*x=x^3+8 equation