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