hard integral 2

1. The problem statement, all variables and given/known data

$$\int_0^1 \frac{x^4(1-x)^4}{1+x^2}\ dx$$

3. The attempt at a solution
A gonio substitution gets nasty really fast moreover the differentiation under the integral sign trick doesn't seem to give more insight (at least that's what I think). Integration by parts gets a ln(.) times something nasty. The boundaries suggest a series expansion or a smart substitution...

Can someone give me a hint?
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 divide the two polinomials and youll get an easier integral

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