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(5*ln(7*x))'The calculation above is a derivative of the function f (x)
(5)'*ln(7*x)+5*(ln(7*x))'
0*ln(7*x)+5*(ln(7*x))'
0*ln(7*x)+5*(1/(7*x))*(7*x)'
0*ln(7*x)+5*(1/(7*x))*((7)'*x+7*(x)')
0*ln(7*x)+5*(1/(7*x))*(0*x+7*(x)')
0*ln(7*x)+5*(1/(7*x))*(0*x+7*1)
0*ln(7*x)+5*x^-1
5*x^-1
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