Lösungen/Solutions/
B1S1Ue/Ex4

L = Lektion/ Leçon   -- Sprechstunde / heures de consultation
W = Work / Arbeit / Travail
A  =Anhang/  Annexe / Appendice

Ueb/Ex 1      L

Ueb/Ex 2      L

Ueb/Ex 3      L

a                             W

s = Sum[k, {k, 0, n - 1}]

Remove["Global`@*"]

b                             L