Additiounen
Additioune
Addition
addition
addition
adição
hie kann esouguer déi schwéierst Additiounen am Kapp maachen
https://lod.lu/uploads/examples/OGG/07/07c3428f4625280854547c49cc0c7b4e.ogg
https://lod.lu/uploads/examples/AAC/07/07c3428f4625280854547c49cc0c7b4e.m4a