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\frac{x^{2}(x-1)^{2}+(x-1)^{2}+x^{2}}{(x^{3}-3x+1)^{2}}
\frac{x^{2}(x-1)^{2}+(x-1)^{2}+x^{2}}{(x^{3}-3x+1)^{2}}
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