What is the integral of (x^3)/((x^4-5)^4) ?

The integral of (x^3)/((x^4-5)^4) is -1/(12(x^4-5)^3)+C

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integral of (x^3)/((x^4-5)^4)

\int \frac{x ^{3}}{( x ^{4} - 5 ) ^{4}} d x

- \frac{1}{12 ( x ^{4} - 5 ) ^{3}} + C

Solution steps

\int \frac{x ^{3}}{( x ^{4} - 5 ) ^{4}} d x

Apply u-substitution

: \int \frac{1}{4 u ^{4}} d u

= \int \frac{1}{4 u ^{4}} d u

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= \frac{1}{4} \cdot \int \frac{1}{u ^{4}} d u

Apply the Power Rule

: - \frac{1}{3 u ^{3}}

= \frac{1}{4} (- \frac{1}{3 u ^{3}})

Substitute back

u = x^{4} - 5

= \frac{1}{4} (- \frac{1}{3 ( x ^{4} - 5 ) ^{3}})

Simplify

\frac{1}{4} (- \frac{1}{3 ( x ^{4} - 5 ) ^{3}}) : - \frac{1}{12 ( x ^{4} - 5 ) ^{3}}

= - \frac{1}{12 ( x ^{4} - 5 ) ^{3}}

Add a constant to the solution

= - \frac{1}{12 ( x ^{4} - 5 ) ^{3}} + C

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What is the integral of (x^3)/((x^4-5)^4) ?
The integral of (x^3)/((x^4-5)^4) is -1/(12(x^4-5)^3)+C