- $ A \\\cap B = \\\left\\\{ {a;\\\;b} \\\right\\\}.$
- $ A \\\cap B = \\\left\\\{ {c;\\\;d;\\\;m} \\\right\\\}.$
- $ A \\\cap B = \\\left\\\{ {c;\\\;d} \\\right\\\}.$
- $ A \\\cap B = \\\left\\\{ {a;\\\;b;\\\;c;\\\;d;\\\;m;\\\;k;\\\;l} \\\right\\\}.$