[Maxima] try antiderivative with other CAS/

[Richard Fateman]

Reinhard Oldenburg wrote:
> The square root has to be spelled Sqrt in Mathematica. Then 6.0 gets:
> 2*Sqrt[1 - x^2 + 2*x*x2 - x2^2] + (1 - 2*x2)*ArcSin[x - x2]
>
> RO
>
>   
Right.  Sorry I missed that.  The [] made me think it was all in 
Mathematica syntax.
I get an answer too from Mma 6.0.
As penance, I tried the same problem on commercial Macsyma. It leaves 
the integral unevaluated.
RJF