Integral of 1/(x^2 (x^4 + 1)^(3/4))

1. A.
   $-\frac{(x^4+1)^{1/4}}{x^4} + c$
2. B.
   $\frac{(x^4+1)^{1/4}}{x^4} + c$
3. C.
   $\left(1+\frac{1}{x^4}\right)^{1/4} + c$
4. D.
   $-\left(1+\frac{1}{x^4}\right)^{1/4} + c$

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1. A.
   $-\left(x^4+1\right)^{1/4}+c$
2. B.
   $-\frac{(x^4+1)^{1/4}}{x}+c$
3. C.
   $-\frac{(x^4+1)^{1/4}}{x}+c$ (same but negative)
4. D.
   $-\left(x^4+1\right)^{1/4}+c$

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1. A.
   $-\left(\frac{x^4+1}{x^4}\right)^{1/4}+c$
2. B.
   $\left(x^4+1\right)^{1/4}+c$
3. C.
   $-\left(x^4+1\right)^{1/4}+c$
4. D.
   $-\frac{(x^4+1)^{1/4}}{x}+c$

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1. A.
   $-\frac{(x^4+1)^{1/4}}{x}+c$
2. B.
   $\frac{(x^4-1)^{1/4}}{x}+c$
3. C.
   $-\frac{(x^4-1)^{1/4}}{x}+c$
4. D.
   $-\frac{(x^4+1)^{1/4}}{x}+c$

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1. A.
   $-\!\left(\dfrac{x^4+1}{x^4}\right)^{1/4}+c$
2. B.
   $\left(\dfrac{x^4+1}{1}\right)^{1/4}+c$
3. C.
   $-\!\left(\dfrac{x^4+1}{1}\right)^{1/4}+c$
4. D.
   $-\!\left(\dfrac{x^4+1}{x^4}\right)^{1/4}+c$

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