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(4*x*tan(x)-cos(3*x))'The calculation above is a derivative of the function f (x)
(4*x*tan(x))'+(-cos(3*x))'
(4*x)'*tan(x)+4*x*(tan(x))'+(-cos(3*x))'
((4)'*x+4*(x)')*tan(x)+4*x*(tan(x))'+(-cos(3*x))'
(0*x+4*(x)')*tan(x)+4*x*(tan(x))'+(-cos(3*x))'
(0*x+4*1)*tan(x)+4*x*(tan(x))'+(-cos(3*x))'
4*tan(x)+4*x*(tan(x))'+(-cos(3*x))'
4*tan(x)+4*x*(1/((cos(x))^2))+(-cos(3*x))'
4*tan(x)+(4*x)/((cos(x))^2)-sin(3*x)*(3*x)'
4*tan(x)+(4*x)/((cos(x))^2)-sin(3*x)*((3)'*x+3*(x)')
4*tan(x)+(4*x)/((cos(x))^2)-sin(3*x)*(0*x+3*(x)')
4*tan(x)+(4*x)/((cos(x))^2)-sin(3*x)*(0*x+3*1)
4*tan(x)+(4*x)/((cos(x))^2)+3*(-sin(3*x))
4*tan(x)+(4*x)/((cos(x))^2)+3*sin(3*x)
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