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Mathematics 21 Online
OpenStudy (anonymous):

* Please Help* Simplify and identify the domain. -5 / 5x + 15 * 2(x + 2) / x^2 + 4 http://static.k12.com/calms_media/media/241000_241500/241386/1/c570062126efd5ca35f7add09bbdac2422dd6f15/06_02_LQ_5c.gif

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