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Completely factorize (2x+3)^-2 + 2x(2x+3)^-3

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Hello,


(1)/((2x+3)^2) + (2x)/((2x+3)^3) \\ = ((2x+3)+2x)/((2x+3)^3)\\ = (4x+3)/((2x+3)^3)
User Hargasinski
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