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