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(6*ln(9*x)-(8*x^3))'The calculation above is a derivative of the function f (x)
(6*ln(9*x))'+(-(8*x^3))'
(6)'*ln(9*x)+6*(ln(9*x))'+(-(8*x^3))'
0*ln(9*x)+6*(ln(9*x))'+(-(8*x^3))'
0*ln(9*x)+6*(1/(9*x))*(9*x)'+(-(8*x^3))'
0*ln(9*x)+6*(1/(9*x))*((9)'*x+9*(x)')+(-(8*x^3))'
0*ln(9*x)+6*(1/(9*x))*(0*x+9*(x)')+(-(8*x^3))'
0*ln(9*x)+6*(1/(9*x))*(0*x+9*1)+(-(8*x^3))'
0*ln(9*x)+(-(8*x^3))'+6*x^-1
8*(x^3)'+(8)'*x^3+6*x^-1
8*(x^3)'+6*x^-1+0*x^3
8*3*x^(3-1)+6*x^-1+0*x^3
8*3*x^2+6*x^-1+0*x^3
6*x^-1-(24*x^2)
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