input: Write a function to perform matrix multiplication on two given matrices. If the matrices cannot be multiplied due to incompatible dimensions, raise a ValueError.
  def matrix_multiplication(A, B):
      rows_A = len(A)
      cols_A = len(A[0])
      rows_B = len(B)
      cols_B = len(B[0])
      if cols_A != rows_B:
          raise ValueError("Matrix dimensions are incompatible for multiplication")
      result = [[0 for i in range(cols_B)] for j in range(rows_A)]
      for i in range(rows_A):
          for j in range(cols_B):
              for k in range(cols_A):
                  result[i][j] += A[i][k] * B[k][j]
      return result
  
  assert matrix_multiplication([[1, 2], [3, 4]], [[5, 6], [7, 8]])==[[19, 22], [43, 50]]
  try:
      matrix_multiplication([[1, 2, 3], [4, 5, 6]], [[7, 8], [9, 10]])
  except ValueError:
      pass
  else:
      assert False, "Expected ValueError for incompatible dimensions"
output: def matrix_multiplication(A, B):
      rows_A = len(A)
      cols_A = len(A[0])
      rows_B = len(B)
      cols_B = len(B[0])
      if cols_A != rows_B:
          raise ValueError("Matrix dimensions are incompatible for multiplication")
      result = [[0 for i in range(cols_B)] for j in range(rows_A)]
      for i in range(rows_A):
          for j in range(cols_B):
              for k in range(cols_A):
                  result[i][j] += A[i][k] * B[k][j]
      return result