\( \int \frac{x^{4}\left(x^{10}-1\right)}{x^{20}+3 x^{10}+1} d x \) equals....
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\( \int \frac{x^{4}\left(x^{10}-1\right)}{x^{20}+3 x^{10}+1} d x \) equals
\( \mathrm{P} \)
(1) \( \operatorname{Tan}^{-1}\left(x^{5}+\frac{1}{x^{5}}\right)+c \)
(2) \( \frac{1}{5} \operatorname{Tan}^{-1}\left(x^{5}+\frac{1}{x^{5}}\right)+c \)
(3) \( 5 \operatorname{Tan}^{-1}\left(x^{5}+\frac{1}{x^{5}}\right)+c \)
(4) \( \frac{1}{10} \operatorname{Tan}^{-1}\left(x^{10}+\frac{1}{x^{10}}\right)+c \)
(4) (B) (9)
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