What is the integral of 1/(x^2 + 4x + 3)

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The integral `int 1/(x^2 + 4x + 3) dx` has to be determined. Use partial fractions.

x^2 + 4x + 3

=> x^2 + 3x + x + 3

=> x(x + 3) + 1(x + 3)

=> (x + 1)(x + 3)

`1/(x^2 + 4x + 3)` =...

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