Question 1071733
y=((x^4)-4x))/((x^4)-4) 
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Step 1, say what you want to do.
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What I tried: 
y=((x^4)-4x)/((x^4)-4)/((x^4)-4) 
(starting out by factoring)
y= x((x^3)-4)/((x^2)-2)((x^2)+2)
(took Greatest common factor and then became confused...