Pointing to a woman,Nirmal said,"She is the daughter of my wife's grandfather's only child". How is the woman related to Nirmal?

$A + B$ means $A$ is the daughter of $B$; $A - B$ means $A$ is the husband of $B$; $A \times B$ means $A$ is the brother of $B$.
If $P + Q \times R$,which of the following is true?

$X$ introduces $Y$ saying,"He is the husband of the granddaughter of the father of my father." How is $Y$ related to $X$?

$A + B$ means $A$ is the daughter of $B$; $A \times B$ means $A$ is the son of $B$; and $A - B$ means $A$ is the wife of $B$. If $Z \times T - S \times U + P$,what is $U$ to $Z$?

$A$ family consists of six members $P, Q, R, X, Y$ and $Z$. $Q$ is the son of $R$ but $R$ is not the mother of $Q$. $P$ and $R$ are a married couple. $Y$ is the brother of $R$. $X$ is the daughter of $P$. $Z$ is the brother of $P$.
How is $Q$ related to $X$?

Neelam,who is Deepak's daughter,says to Deepika,"Your mother Rekha is the younger sister of my father who is the third child of Ramlal." How is Ramlal related to Deepika?