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[" 9.1f "int(2x^(2)+a^(2))/(x^(2)(x^(2)+...

[" 9.1f "int(2x^(2)+a^(2))/(x^(2)(x^(2)+a^(2)))dx=(k)/(x)+(1)/(a)tan^(-1)(x)/(a)+c" then "k=],[" 1) "0," 2) "-1]" ,如) "1

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