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((3*x-1)/(7*x+2))'The calculation above is a derivative of the function f (x)
((3*x-1)'*(7*x+2)-((3*x-1)*(7*x+2)'))/((7*x+2)^2)
(((3*x)'+(-1)')*(7*x+2)-((3*x-1)*(7*x+2)'))/((7*x+2)^2)
((3*(x)'+(3)'*x+(-1)')*(7*x+2)-((3*x-1)*(7*x+2)'))/((7*x+2)^2)
((3*(x)'+0*x+(-1)')*(7*x+2)-((3*x-1)*(7*x+2)'))/((7*x+2)^2)
((0*x+3*1+(-1)')*(7*x+2)-((3*x-1)*(7*x+2)'))/((7*x+2)^2)
((0+3)*(7*x+2)-((3*x-1)*(7*x+2)'))/((7*x+2)^2)
(3*(7*x+2)-((3*x-1)*(7*x+2)'))/((7*x+2)^2)
(3*(7*x+2)-((3*x-1)*((7*x)'+(2)')))/((7*x+2)^2)
(3*(7*x+2)-((3*x-1)*(7*(x)'+(7)'*x+(2)')))/((7*x+2)^2)
(3*(7*x+2)-((3*x-1)*(7*(x)'+0*x+(2)')))/((7*x+2)^2)
(3*(7*x+2)-((3*x-1)*(0*x+7*1+(2)')))/((7*x+2)^2)
(3*(7*x+2)-((3*x-1)*(0+7)))/((7*x+2)^2)
(3*(7*x+2)-((3*x-1)*7))/((7*x+2)^2)
(3*(7*x+2)-(7*(3*x-1)))/((7*x+2)^2)
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