diff --git a/compute.py b/compute.py
index 30d7c8f..7dc9cbc 100644
--- a/compute.py
+++ b/compute.py
@@ -1,6 +1,7 @@
 # Matrixfunktionen für MatrixMania
 """Functions for matrix calculations."""
-
+import math
+from tabulate import tabulate
 
 def _validate_matrix(matrix: list[list[int | float]], name: str) -> tuple[int, int]:
     """Validate a non-empty, rectangular matrix with numeric entries.
@@ -131,9 +132,6 @@ def rotate(matrix: list[list[int | float]]) -> list[list[int | float]]:
     return [row[::-1] for row in transposed]
 
 
-import math
-
-
 def rot_2D(theta: float) -> list[list[float]]:
     """Return the 2D rotation matrix for an angle in radians.
 
@@ -228,5 +226,6 @@ if __name__ == "__main__":
             )
 
     print("Test 9 passed:", rotation_90)
+    print(tabulate(rot_2D(1.0)))
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 54dbd8c..2f2d6aa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,3 +2,4 @@
 [project]
 name = "matrixmania"
 version = "0.1.0"
+dependencies = ["tabulate", "ruff"]