Question 872805
{{{((13/(35+2x-x^2)) - (1/(x+5)))/ ( (1/ (x+5)) +1 )}}}





{{{((13/((7-x)(5+x))) - (1/(x+5)))/ ( ((x+6)/ (x+5)) )}}}



{{{((13-7+x)/(x+5))/((x+6)/(x+5)))}}}


{{{((x+6)/(x+5))*((x+5)/(x+6))}}}

=1