Expression Evaluation for Interval

[C FS]

Hi,

I would like to evaluate an expression on an interval.

Substituting .subs the intervals in the expression ..

or ImageSet for a product set could be a way.

But couldn't figure it out yet.

ImageSet seems to be unevaluated and couldn't get .start, .end

set = ImageSet(Lambda((x, y, z), 2.0*y*z), Interval(-1, 1)*Interval(-1, 1)*Interval(-1, 1))
print([set.start, set.end])

Thanks!