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April 20, 2014

April 20, 2014

Posted by **aly** on Saturday, January 19, 2013 at 8:03pm.

- math -
**Reiny**, Saturday, January 19, 2013 at 9:06pmx^-2+ x^-4

= 1/x^2 + 1/x^4

=(x^2 +1)/x^4

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