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(2x+5)^2(3)(x^2+3)^2(2x) - (x^2+3)^3(2)(2x+5)(2)/(2x+5)^4
(2x+5)^2(3)(x^2+3)^2(2x) - (x^2+3)^3(2)(2x+5)(2)/(2x+5)^4
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