Nó bị như vậy mà không hiện ra bạn ak :v
\displaystyle{1+\dfrac{x+3}{\sqrt[3]{(x^2-1)^2+2\sqrt[3]{x^2-1}+4}=\dfrac{x^2+3x+9}{\sqrt{x^3-2}+5}}
\displaystyle{1+\dfrac{x+3}{\sqrt[3]{(x^2-1)^2+2\sqrt[3]{x^2-1}+4}=\dfrac{x^2+3x+9}{\sqrt{x^3-2}+5}}
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