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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: Bài 7: thực hiện phép tính như sau: a, $\frac{4-2x}{x^2-4}$+$\frac{2x}{x-2}$+$\frac{-x}{x+2}$ b, $\frac{1}{x+1}$+$\frac{x}{x-1}$+$\frac{2}{x^2-1}$ c, $\frac{3}{2x}$+$\frac{3x-3}{2x-1}$+$\frac{2x^2+1}{4x^2-2x}$ giúp mik vs mik vote 5 sao cho { "@context": "https://schema.org", ...

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