Question 808100
find the derivative of this question: 
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f'(x) = {{{atan(x) + x/(1+x^2) - (1/2)*(x^2+1)^(-1)*2x}}}
f'(x) = {{{atan(x) + x/(1+x^2) + 1/(x^2+1)}}}
f'(x) = {{{atan(x) + (x+1)/(1+x^2)}}}
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Is there some reason you couldn't do that?