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(sin(6/x-8))'The calculation above is a derivative of the function f (x)
cos(6/x-8)*(6/x-8)'
cos(6/x-8)*((6/x)'+(-8)')
cos(6/x-8)*(((6)'*x-(6*(x)'))/(x^2)+(-8)')
cos(6/x-8)*((0*x-(6*(x)'))/(x^2)+(-8)')
cos(6/x-8)*((0*x-(6*1))/(x^2)+(-8)')
cos(6/x-8)*(0-6/(x^2))
(-6/(x^2))*cos(6/x-8)
(-6*cos(6/x-8))/(x^2)
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