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  2. Algebra - Wikipedia

    en.wikipedia.org/wiki/Algebra

    Algebra is the branch of mathematics that studies certain abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication.

  3. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    3. Subfactorial: if n is a positive integer, !n is the number of derangements of a set of n elements, and is read as "the subfactorial of n". * Many different uses in mathematics; see Asterisk § Mathematics. | 1. Divisibility: if m and n are two integers, means that m divides n evenly. 2.

  4. Plus and minus signs - Wikipedia

    en.wikipedia.org/wiki/Plus_and_minus_signs

    When placed after special sets of numbers, plus and minus signs are used to indicate that only positive numbers and negative numbers are included, respectively. For example, Z + {\displaystyle \mathbb {Z} ^{+}} is the set of all positive integers and Z − {\displaystyle \mathbb {Z} ^{-}} is the set of all negative integers.

  5. FBI says it has discovered new files on JFK assassination - AOL

    www.aol.com/news/fbi-says-discovered-files-jfk...

    CNN — The FBI has discovered about 2,400 new records related to the assassination of President John F. Kennedy from a new records search following an executive order from President Donald Trump.

  6. The Most Addictive Foods, According to Science - AOL

    www.aol.com/finance/most-addictive-foods...

    1. Pizza. Why, of course, it would be pizza, and not steamed broccoli, because apparently, everything that tastes good comes with a catch. Pizza, one of — if not the — most universally loved ...

  7. Super Bowl 59: Which celebrities, big names are expected to ...

    www.aol.com/entertainment/super-bowl-59...

    Sunday's game will mark the second Super Bowl for Swift, who cheered on her boyfriend, Kansas City Chiefs tight end Travis Kelce last year with help from some of her closest girlfriends last year.