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