HP Prime Graphing Calculator integration

[PCReid]

How do I perform multiple integrals with the HP Prime, such as a double-integral, see enclosed. 

[Maké]

Hi!, @PCReid:

Welcome, to Forum!. 

See, this link ... http://h30434.www3.hp.com/t5/Desktop-Hardware-and-Upgrade-Questions/HP-Prime-Double-integrals/td-p/4...

[PCReid]

Yes, I saw that, but I don't get expected answers with slightly more complicated problems, like the enclosed one, see strange answer below.  I must be something wrong:

[Maké]

Hi!, @PCReid:

You can use, Algebraic and CAS.

In comparise, with Wolfram Alpha ...

[cyrille]

Hello,

You can perform your double integral prety much as you did in the original post, in the CAS...

However, your original post had ONE error. you entered the second integral as part of the 'from' part of the first integral (just right of the 0, making it an implicit multiplication), instead as in its proper place left of the dy symbol. You can tell that it is wrong as there is that small square left of that dy showing that something is missing there.

regards,

Cyrille