A+B means ‘A is the husband of B’;
A-B means ‘B is the sister of A’;
A $$\times$$ B means ‘A is the mother of B’;
$$ A\div B $$ means ‘B is the son of A’.
If, $$ P + R \times T - Q \div S+U,$$ then how is P related to S?
In the diagram, square shows the males, circle shows the females, vertical lines shows the generation, single horizontal lines shows the brother/sister and double horizontal lines shows the couples.
From the diagram,
P is the maternal grandfather of S.
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