Question 674023
trying to help my HS daughter factor (x^3-x^2 y+x y^2-y^3)/(x^4-y^4) 
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That's a division problem.
It might be simplified by factoring the NUM and the DEN.
For the DEN:
{{{x^4-y^4 = (x^2 - y^2)*(x^2 + y^2) = (x-y)*(x+y)*(x^2+ y^2)}}}
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The factors of the NUM are not obvious, if there are any.
I'll work on it later.