Question 817540
{{{(1/2)(log5(x)+log5(y))-2 log5(x+7)}}}

{{{(1/2)(log5(xy)-log5((x+7)^2))}}}

{{{(log5(((xy)/((x+7)^2))^(1/2)))}}}
or
{{{(log5(sqrt((xy)/((x+7)^2))))}}}