$$A + B$$ means ‘A is the wife of B’;
$$A - B$$ means ‘B is the daughter of A’;
$$A \times B$$ means ‘B is the brother of A’;
$$A \div B$$ means ‘A is the father of B’.
If, $$P + R \times T - Q + S \div U$$, then how is $$P$$ related to the mother of $$U$$?
In the diagram, Circle shows the female, square shows the male, vertical lines show the generation, single horizontal line shows the brother/sister and double horizontal lines show the couple.
From the diagram,
Mother of 'U' is aunt of the 'P'.
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