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![\times \frac{1}{3 \sqrt{7 - 2} } \times \frac{1}{3 \sqrt{7 - 2} }](https://tex.z-dn.net/?f=+%5Ctimes+%5Cfrac%7B1%7D%7B3+%5Csqrt%7B7+-+2%7D+%7D+)
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i think it will helps u ok
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