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inte^tan^((-1)x)(1+x+x^2)d(cot^(-1)x)i s...

`inte^tan^((-1)x)(1+x+x^2)d(cot^(-1)x)i se q u a lto` `-e^tan^((-1)x)+c` (b) `e^tan^((-1)x)+c` `-xe^tan^((-1)x)+c` (d) `xe^tan^((-1)x)+c`

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