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