Why does an image of a plug with the label "object n" appear in the formula box after I attempt to enter a formula in a text document?

English
, , , , ,
#1

Why does an image of a plug with the label “object n” appear in the formula box after I attempt to enter a formula in a text document?

#2

Impressum (Legal Info) | Datenschutzerklärung (Privacy Policy)   Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.