Question 1115691
{{{(1/(a-b)-1/(a+b))/(1/(a+b)+1/(a+b))}}}


{{{(1/(a-b)-1/(a+b))/(2/(a+b))}}}


Multiply entire expression by  {{{((a-b)(a+b))/((a-b)(a+b))}}}.


{{{((a+b)-(a-b))/(2(a-b))}}}


{{{(2b)/(2(a-b))}}}


{{{highlight_green(b/(a-b))}}}