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

Toán Lớp 8: a, [(x/x^2-25) – (x-5/X^2+5x)] : (2x-5/x^2+5x) + ( x/ 5-x) b, [(9/x^3-9x) + (1/x+3)] : [(x-3/x^2+ 3x) – ( x/3x+9)] c, (1/x-1) – (x^3-

Toán Lớp 8: a, [(x/x^2-25) – (x-5/X^2+5x)] : (2x-5/x^2+5x) + ( x/ 5-x)
b, [(9/x^3-9x) + (1/x+3)] : [(x-3/x^2+ 3x) – ( x/3x+9)]
c, (1/x-1) – (x^3-x/x^2+1) . [(x/x^2+1-2x) + (1/1-x^2)]
Rút gọn các ý trên! Cảm ơn nhiều ạ

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