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In some applications and programming languages, notably Microsoft Excel, PlanMaker (and other spreadsheet applications) and the programming language bc, unary operations have a higher priority than binary operations, that is, the unary minus has higher precedence than exponentiation, so in those languages −3 2 will be interpreted as (−3) 2 ...
The two subjects of mathematical logic and set theory have belonged to mathematics since the end of the 19th century. [ 46 ] [ 47 ] Before this period, sets were not considered to be mathematical objects, and logic , although used for mathematical proofs, belonged to philosophy and was not specifically studied by mathematicians.