These are chat archives for symengine/symengine
series(ex,n1)^2) but the bug ticket was turned down because I found that GiNaC explicitly disabled it, and they provided the expansion if one gave the command
series(series(ex, n1)^2, n2). So you get more control on the precision. And noone wanted to change the GiNaC default. I'm divided on the matter. I doubt the benefit is so important.
abs(x),floor(x),dirac_delta(x). However, they can be differentiated, so there could be a series (although I have never seen it)