Integral Fail

[robmio]

It's a bit cumbersome, but you have to do this:

factor(x^2-2*x-1) -> (x-1)^2

Therefore:

factor(int(((x-1)^2)^(4/3),x)) -> (3*(x-1)^3*((x-1)^(1/3))^2)/11

Welcome those who have a less cumbersome answer!