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(-3*sin(3*x)-(3*cos(3*x)))'The calculation above is a derivative of the function f (x)
(-3*sin(3*x))'+(-(3*cos(3*x)))'
(-3)'*sin(3*x)-3*(sin(3*x))'+(-(3*cos(3*x)))'
0*sin(3*x)-3*(sin(3*x))'+(-(3*cos(3*x)))'
0*sin(3*x)-3*cos(3*x)*(3*x)'+(-(3*cos(3*x)))'
0*sin(3*x)-3*cos(3*x)*((3)'*x+3*(x)')+(-(3*cos(3*x)))'
0*sin(3*x)-3*cos(3*x)*(0*x+3*(x)')+(-(3*cos(3*x)))'
0*sin(3*x)-3*cos(3*x)*(0*x+3*1)+(-(3*cos(3*x)))'
0*sin(3*x)-3*3*cos(3*x)+(-(3*cos(3*x)))'
(3)'*cos(3*x)-9*cos(3*x)+3*(cos(3*x))'
0*cos(3*x)-9*cos(3*x)+3*(cos(3*x))'
0*cos(3*x)-9*cos(3*x)+3*-sin(3*x)*(3*x)'
0*cos(3*x)-9*cos(3*x)+3*-sin(3*x)*((3)'*x+3*(x)')
0*cos(3*x)-9*cos(3*x)+3*-sin(3*x)*(0*x+3*(x)')
0*cos(3*x)-9*cos(3*x)+3*-sin(3*x)*(0*x+3*1)
0*cos(3*x)-9*cos(3*x)+3*3*(-sin(3*x))
0*cos(3*x)-9*cos(3*x)+3*-3*sin(3*x)
9*sin(3*x)-(9*cos(3*x))
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