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If I=intdx/(x^4sqrt(a^2+x^2)),t h e nI e...

If `I=intdx/(x^4sqrt(a^2+x^2)),t h e nI` equals `1/(a^4)[1/xsqrt(a^2+x^2)-1/(3x^3)sqrt(a^2+x^2)]+c` `1/(a^4)[1/xsqrt(a^2+x^2)-1/(3x^3)(a^2+x^2)^(3//2)]+c` `1/(a^4)[1/xsqrt(a^2+x^2)-1/(2sqrt(x))(a^2+x^2)^(3//2)]+c` `1/(a^4)[1/xsqrt(a^2+x^2)+1/(3x^3)sqrt(a^2+x^2)]+c`

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