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(3*sin(2*x-8))'The calculation above is a derivative of the function f (x)
(3)'*sin(2*x-8)+3*(sin(2*x-8))'
0*sin(2*x-8)+3*(sin(2*x-8))'
0*sin(2*x-8)+3*cos(2*x-8)*(2*x-8)'
0*sin(2*x-8)+3*cos(2*x-8)*((2*x)'+(-8)')
0*sin(2*x-8)+3*cos(2*x-8)*(2*(x)'+(2)'*x+(-8)')
0*sin(2*x-8)+3*cos(2*x-8)*(2*(x)'+0*x+(-8)')
0*sin(2*x-8)+3*cos(2*x-8)*(0*x+2*1+(-8)')
0*sin(2*x-8)+3*(0+2)*cos(2*x-8)
0*sin(2*x-8)+3*2*cos(2*x-8)
6*cos(2*x-8)
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