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