Pointng out to a lady, a girl said, "She is the daughter-in-law of the grandmother of my father's only son."
How is the lady related to the girl ?
Pointing to a man in a photograph, Asha said, "His mother's only daughter is my mother."
How is Asha related to that man ?
A + B means A is the daughter of B ;
A - B means A is the husband of B ;
A x B means A is the brother of B.