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(2*x*ln(9*x)-(2*x))'The calculation above is a derivative of the function f (x)
(2*x*ln(9*x))'+(-(2*x))'
(2*x)'*ln(9*x)+2*x*(ln(9*x))'+(-(2*x))'
((2)'*x+2*(x)')*ln(9*x)+2*x*(ln(9*x))'+(-(2*x))'
(0*x+2*(x)')*ln(9*x)+2*x*(ln(9*x))'+(-(2*x))'
(0*x+2*1)*ln(9*x)+2*x*(ln(9*x))'+(-(2*x))'
2*ln(9*x)+2*x*(ln(9*x))'+(-(2*x))'
2*ln(9*x)+2*x*(1/(9*x))*(9*x)'+(-(2*x))'
2*ln(9*x)+2*x*(1/(9*x))*((9)'*x+9*(x)')+(-(2*x))'
2*ln(9*x)+2*x*(1/(9*x))*(0*x+9*(x)')+(-(2*x))'
2*ln(9*x)+2*x*(1/(9*x))*(0*x+9*1)+(-(2*x))'
2*ln(9*x)+(-(2*x))'+2*x*x^-1
2*ln(9*x)+2*(x)'+(2)'*x+2
2*ln(9*x)+2*(x)'+0*x+2
2*ln(9*x)+0*x+2*1+2
2*ln(9*x)
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