TRả lời giúp mình ạ

1$$\\x^{2}\sqrt{x}\sqrt[n]{x}\frac{x}{y}x_{12}\leq\geq\neq\pi\alpha\beta\left \{ {{y=2} \atop {x=2}} \right.\int\limits^a_b {x} \, dx\lim_{n \to \infty} a_n\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]$$ ² ³ √ ∛ · × ÷ ± ≈ ≤ ≥ ≡ ⇒ ⇔ ∈ ∉ ∧ ∨ ∞ Δ π Ф ω ↑ ↓ ∵ ∴ ↔ → ← ⇵ ⇅ ⇄ ⇆ ∫ ∑ ⊂ ⊆ ⊇ ⊄ ⊅ ∀ ∠ ∡ ⊥ ∪ ∩ ∅ ⊕ ║

1$$\\x^{2}\sqrt{x}\sqrt[n]{x}\frac{x}{y}x_{12}\leq\geq\neq\pi\alpha\beta\left \{ {{y=2} \atop {x=2}} \right.\int\limits^a_b {x} \, dx\lim_{n \to \infty} a_n\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]$$ ² ³ √ ∛ · × ÷ ± ≈ ≤ ≥ ≡ ⇒ ⇔ ∈ ∉ ∧ ∨ ∞ Δ π Ф ω ↑ ↓ ∵ ∴ ↔ → ← ⇵ ⇅ ⇄ ⇆ ∫ ∑ ⊂ ⊆ ⊇ ⊄ ⊅ ∀ ∠ ∡ ⊥ ∪ ∩ ∅ ⊕ ║

1$$\\x^{2}\sqrt{x}\sqrt[n]{x}\frac{x}{y}x_{12}\leq\geq\neq\pi\alpha\beta\left \{ {{y=2} \atop {x=2}} \right.\int\limits^a_b {x} \, dx\lim_{n \to \infty} a_n\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]$$ ² ³ √ ∛ · × ÷ ± ≈ ≤ ≥ ≡ ⇒ ⇔ ∈ ∉ ∧ ∨ ∞ Δ π Ф ω ↑ ↓ ∵ ∴ ↔ → ← ⇵ ⇅ ⇄ ⇆ ∫ ∑ ⊂ ⊆ ⊇ ⊄ ⊅ ∀ ∠ ∡ ⊥ ∪ ∩ ∅ ⊕ ║

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