Question 919708
{{{a/(a-b)+a/(b-a)}}} ...you can write {{{(b-a)}}} as {{{-(a-b)}}}


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


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


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

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

{{{0}}}