Evaluate ( int frac{2}{x^{2}+2 x+1} d x ). Note || is the absolute value function. The answer is: a) ( 2 ln left|x^{2}+2 x+1 ight|+mathrm{C} ) b) ( ln left|x^{2}+2 x+1 ight|+C ) c) ( -frac{2}{x+1}+C ) d) ( 2 ln |x+1|+C ) e) ( ln |x+1|+C ) f) None of (a) through (e) are correct
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