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((3*tan(x))/(x+8))'The calculation above is a derivative of the function f (x)
((3*tan(x))'*(x+8)-(3*tan(x)*(x+8)'))/((x+8)^2)
(((3)'*tan(x)+3*(tan(x))')*(x+8)-(3*tan(x)*(x+8)'))/((x+8)^2)
((0*tan(x)+3*(tan(x))')*(x+8)-(3*tan(x)*(x+8)'))/((x+8)^2)
((0*tan(x)+3*(1/((cos(x))^2)))*(x+8)-(3*tan(x)*(x+8)'))/((x+8)^2)
((3/((cos(x))^2))*(x+8)-(3*tan(x)*(x+8)'))/((x+8)^2)
((3/((cos(x))^2))*(x+8)-(3*tan(x)*((x)'+(8)')))/((x+8)^2)
((3/((cos(x))^2))*(x+8)-(3*tan(x)*((8)'+1)))/((x+8)^2)
((3/((cos(x))^2))*(x+8)-(3*tan(x)*(0+1)))/((x+8)^2)
((3/((cos(x))^2))*(x+8)-(3*tan(x)*1))/((x+8)^2)
((3*(x+8))/((cos(x))^2)-(3*tan(x)))/((x+8)^2)
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