<Tr> <Th> Category </Th> </Tr> <Tr> <Td> + </Td> <Td> + (\ displaystyle +) </Td> <Td> addition plus; add arithmetic </Td> <Td> 2 + 7 means the sum of 2 and 7 . </Td> <Td> 2 + 7 = 9 </Td> </Tr> <Tr> <Td> disjoint union the disjoint union of...and...set theory </Td> <Td> A + A means the disjoint union of sets A and A . </Td> <Td> A = (3, 4, 5, 6) ∧ A = (7, 8, 9, 10) ⇒ A + A = ((3, 1), (4, 1), (5, 1), (6, 1), (7, 2), (8, 2), (9, 2), (10, 2)) </Td> </Tr> <Tr> <Td> − </Td> <Td> − (\ displaystyle -) </Td> <Td> subtraction minus; take; subtract arithmetic </Td> <Td> 36 − 11 means the subtraction of 11 from 36 . </Td> <Td> 36 − 11 = 25 </Td> </Tr>

Y is a multiple of 10 in mathematical symbols