OK, in posting a new blog, there is an "Attachment" section... So I could add the three GIFs. They don't show up in the preview, but they did come out when I actually posted...

> sum((-2)^k, k=1..infinity);
 

sum((-2)^k, k = 1 .. infinity) 

> _EnvFormal := true;
 

(Typesetting:-mprintslash)([_EnvFormal := true], [true]) 

> sum((-2)^k, k=1..infinity);
 

(-2)/3 

>

Please Wait...