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数字のエラーが修正されました。 3分の2の2005乗に(-2分の3)を掛けた2006乗 =3分の2の2005乗に2分の3を掛けた2006乗 =(3分の2×2分の3)の2005乗×2分の3 =1の2005乗×2分の3 =1.5
2006^2-(2006+1)(2006-1)=2006^2-2006^2+1=1
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