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(2*x-(72/x))'The calculation above is a derivative of the function f (x)
(2*x)'+(-(72/x))'
2*(x)'+(-(72/x))'+(2)'*x
2*(x)'+(-(72/x))'+0*x
(-(72/x))'+0*x+2*1
((72)'*x-(72*(x)'))/(x^2)+2
(0*x-(72*(x)'))/(x^2)+2
(0*x-(72*1))/(x^2)+2
72*x^-2+2
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