‘A + B’ means ‘B is the father of A’
‘A - B’ means ‘B is the mother of A’
‘A @ B’ means ‘B is the brother of A’
‘A * B’ means ‘B is the son of A’
If A * B + C @ D - E, then how is E related to A?

A

Sister

B

Mother

C

Mother-in-law

D

Brother's wife