Question 765559
{{{(a^2-4a+4)/(2a^2-8)}}}


{{{(a^2-2a-2a+4)/2(a^2-4)}}}


{{{((a^2-2a)-(2a-4))/2((a+2)(a-2))}}}


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


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


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


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