Evaluate
\left(x^{2}+2\right)\times \left(\frac{2x^{2}-1}{x}\right)^{6}
Expand
64x^{8}-64x^{6}-144x^{4}+320x^{2}-260+\frac{108}{x^{2}}-\frac{23}{x^{4}}+\frac{2}{x^{6}}
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