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

The integral of (4x^3+x+1)/(x^3-1) is

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integral of (4x^3+x+1)/(x^3-1)

\int \frac{4 x ^{3} + x + 1}{x ^{3} - 1} d x

4 x + 2 ln ∣ x - 1 ∣ - \frac{5}{6} ln 4 x^{2} + 4 x + 4 - \frac{5}{3} arctan (\frac{1}{3} (2 x + 1)) + \frac{1}{6} (- ln \frac{4 x ^{2} + 4 x}{3} + \frac{4}{3} + 23 arctan (\frac{2 x + 1}{3})) + C

Solution steps

\int \frac{4 x ^{3} + x + 1}{x ^{3} - 1} d x

Expand

\frac{4 x ^{3} + x + 1}{x ^{3} - 1} : \frac{4 x ^{3}}{x ^{3} - 1} + \frac{x}{x ^{3} - 1} + \frac{1}{x ^{3} - 1}

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int \frac{4 x ^{3}}{x ^{3} - 1} d x + \int \frac{x}{x ^{3} - 1} d x + \int \frac{1}{x ^{3} - 1} d x

\int \frac{4 x ^{3}}{x ^{3} - 1} d x = 4 (x + \frac{1}{3} ln ∣ x - 1 ∣ - \frac{1}{6} ln 4 x^{2} + 4 x + 4 - \frac{1}{3} arctan (\frac{1}{3} (2 x + 1)))

\int \frac{x}{x ^{3} - 1} d x = \frac{1}{3} ln ∣ x - 1 ∣ + \frac{1}{6} (- ln \frac{4}{3} + \frac{4 x ^{2} + 4 x}{3} + 23 arctan (\frac{2 x + 1}{3}))

\int \frac{1}{x ^{3} - 1} d x = \frac{1}{3} ln ∣ x - 1 ∣ - \frac{1}{6} ln 4 x^{2} + 4 x + 4 - \frac{1}{3} arctan (\frac{1}{3} (2 x + 1))

= 4 (x + \frac{1}{3} ln ∣ x - 1 ∣ - \frac{1}{6} ln 4 x^{2} + 4 x + 4 - \frac{1}{3} arctan (\frac{1}{3} (2 x + 1))) + \frac{1}{3} ln ∣ x - 1 ∣ + \frac{1}{6} (- ln \frac{4}{3} + \frac{4 x ^{2} + 4 x}{3} + 23 arctan (\frac{2 x + 1}{3})) + \frac{1}{3} ln ∣ x - 1 ∣ - \frac{1}{6} ln 4 x^{2} + 4 x + 4 - \frac{1}{3} arctan (\frac{1}{3} (2 x + 1))

Simplify

4 (x + \frac{1}{3} ln ∣ x - 1 ∣ - \frac{1}{6} ln 4 x^{2} + 4 x + 4 - \frac{1}{3} arctan (\frac{1}{3} (2 x + 1))) + \frac{1}{3} ln ∣ x - 1 ∣ + \frac{1}{6} (- ln \frac{4}{3} + \frac{4 x ^{2} + 4 x}{3} + 23 arctan (\frac{2 x + 1}{3})) + \frac{1}{3} ln ∣ x - 1 ∣ - \frac{1}{6} ln 4 x^{2} + 4 x + 4 - \frac{1}{3} arctan (\frac{1}{3} (2 x + 1)) : 4 x + 2 ln ∣ x - 1 ∣ - \frac{5}{6} ln 4 x^{2} + 4 x + 4 - \frac{5}{3} arctan (\frac{1}{3} (2 x + 1)) + \frac{1}{6} (- ln \frac{4 x ^{2} + 4 x}{3} + \frac{4}{3} + 23 arctan (\frac{2 x + 1}{3}))

= 4 x + 2 ln ∣ x - 1 ∣ - \frac{5}{6} ln 4 x^{2} + 4 x + 4 - \frac{5}{3} arctan (\frac{1}{3} (2 x + 1)) + \frac{1}{6} (- ln \frac{4 x ^{2} + 4 x}{3} + \frac{4}{3} + 23 arctan (\frac{2 x + 1}{3}))

Add a constant to the solution

= 4 x + 2 ln ∣ x - 1 ∣ - \frac{5}{6} ln 4 x^{2} + 4 x + 4 - \frac{5}{3} arctan (\frac{1}{3} (2 x + 1)) + \frac{1}{6} (- ln \frac{4 x ^{2} + 4 x}{3} + \frac{4}{3} + 23 arctan (\frac{2 x + 1}{3})) + C

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What is the integral of (4x^3+x+1)/(x^3-1) ?
The integral of (4x^3+x+1)/(x^3-1) is