Question 1111005
As a start, substitute {{{1/x}}} in place of x.


{{{g(1/(1/x))=((1/x)^2)/(2+1/x)}}}


Left side becomes   {{{g(x)}}}...


{{{g(x)=((1/x^2)/(2+1/x))(x^2/x^2)}}}


{{{g(x)=1/(2x^2+x)}}}

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