Simplify the following expressions into simplest terms:
{[-x + y + (-2) ] * [x - y]} / [(x - y)^2 + (x+y)^2]
Good luck with that.
http://www.wolframalpha.com/input/?i={[-x+%2B+y+%2B+%28-2%29+]+*+[x+-+y]}+%2F+[%28x+-+y%29^2+%2B+%28x%2By%29^2]+
{[-x + y + (-2) ] * [x - y]} / [(x - y)^2 + (x+y)^2]
http://www.wolframalpha.com/input/?i={[-x+%2B+y+%2B+%28-2%29+]+*+[x+-+y]}+%2F+[%28x+-+y%29^2+%2B+%28x%2By%29^2]+