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(12*x*cos(6*x^2))'The calculation above is a derivative of the function f (x)
(12*x)'*cos(6*x^2)+12*x*(cos(6*x^2))'
((12)'*x+12*(x)')*cos(6*x^2)+12*x*(cos(6*x^2))'
(0*x+12*(x)')*cos(6*x^2)+12*x*(cos(6*x^2))'
(0*x+12*1)*cos(6*x^2)+12*x*(cos(6*x^2))'
12*cos(6*x^2)+12*x*(cos(6*x^2))'
12*cos(6*x^2)+12*x*-sin(6*x^2)*(6*x^2)'
12*cos(6*x^2)+12*x*-sin(6*x^2)*((6)'*x^2+6*(x^2)')
12*cos(6*x^2)+12*x*-sin(6*x^2)*(0*x^2+6*(x^2)')
12*cos(6*x^2)+12*x*-sin(6*x^2)*(0*x^2+6*2*x^(2-1))
12*cos(6*x^2)+12*x*-sin(6*x^2)*(0*x^2+6*2*x)
12*cos(6*x^2)+12*x*12*x*(-sin(6*x^2))
12*cos(6*x^2)+12*x*-12*x*sin(6*x^2)
12*cos(6*x^2)-(144*x^2*sin(6*x^2))
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