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**1. Homework Statement**

Evaluate the integral: [tex]\int[/tex][tex]\frac{dx}{x^{3}+x^{2}+x+1}[/tex]

from infinity to zero

**2. Homework Equations**

lim t--> infinity [/tex] [tex]\int[/tex] [tex]\frac{dx}{x^{3}+x^{2}+x+1}[/tex]

**3. The Attempt at a Solution**

lim t-->infinity [/tex] [tex]\int[/tex] [tex]\frac{dx}{(x+1)(x^{2}+1}[/tex]

I'm stuck on where to go from here. I tried partial fractions, but can't seem to get it. any hints would be a great help!