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(-3*sin(2*x)-3)'The calculation above is a derivative of the function f (x)
(-3*sin(2*x))'+(-3)'
(-3)'*sin(2*x)-3*(sin(2*x))'+(-3)'
0*sin(2*x)-3*(sin(2*x))'+(-3)'
0*sin(2*x)-3*cos(2*x)*(2*x)'+(-3)'
0*sin(2*x)-3*cos(2*x)*((2)'*x+2*(x)')+(-3)'
0*sin(2*x)-3*cos(2*x)*(0*x+2*(x)')+(-3)'
0*sin(2*x)-3*cos(2*x)*(0*x+2*1)+(-3)'
0*sin(2*x)-3*2*cos(2*x)+(-3)'
0-6*cos(2*x)
-6*cos(2*x)
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