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(3*(4/x)*e^x)'The calculation above is a derivative of the function f (x)
(3*(4/x))'*e^x+3*(4/x)*(e^x)'
((3)'*(4/x)+3*(4/x)')*e^x+3*(4/x)*(e^x)'
(0*(4/x)+3*(4/x)')*e^x+3*(4/x)*(e^x)'
(0*(4/x)+3*(((4)'*x-(4*(x)'))/(x^2)))*e^x+3*(4/x)*(e^x)'
(0*(4/x)+3*((0*x-(4*(x)'))/(x^2)))*e^x+3*(4/x)*(e^x)'
(0*(4/x)+3*((0*x-(4*1))/(x^2)))*e^x+3*(4/x)*(e^x)'
(0*(4/x)+3*(-4/(x^2)))*e^x+3*(4/x)*(e^x)'
(-12/(x^2))*e^x+3*(4/x)*(e^x)'
(-12/(x^2))*e^x+3*(4/x)*ln(e)*e^x
(-12/(x^2))*e^x+3*(4/x)*e^x
(12*x^2*e^x-(12*x*e^x))/(x^3)
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