diff --git a/Math/Books/konkrete-mathematik-mit-python.md b/Math/Books/konkrete-mathematik-mit-python.md
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-# Bearbeitung der Aufgaben von `Konkrete Mathematik mit Python`
-
-## 15
-
-```python
-def potenz(a: int, b: int) -> int:
-    p = 1
-    while b > 0:
-        p *= a
-        b -= 1
-    return p
-
-assert potenz(2, 2) == 4
-assert potenz(3, 3) == 27
-assert potenz(3, 0) == 1
-```
-
-## 17 
diff --git a/Math/Discrete Math/Sets.md b/Math/Discrete Math/Sets.md
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-# Set-builder notation
-The set of all $x$ in $S$ such that $P(x)$ is true -> $\{ x \in S | P(x) \}$