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April 19, 2014

April 19, 2014

Posted by **Anna** on Sunday, April 1, 2012 at 11:08pm.

x^-4+y^-4/x^-3+y^-3

- algebra -
**Steve**, Monday, April 2, 2012 at 11:52am(x^-4 + y^-4) / (x^-3 + y^-3)

(y^4 + x^4)/(x^4*y^4) / (y^3 + x^3)/(x^3*y^3)

(x^4 + y^4)/(x^4*y^4) * (x^3*y*3)/(x^3 + y^3)

(x^4 + y^4)/(xy(x^3+y^3))

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