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2. Exponentiation - Wikipedia

   en.wikipedia.org/wiki/Exponentiation

   Also unlike addition and multiplication, exponentiation is not associative: for example, (2 3) 2 = 8 2 = 64, whereas 2 (3 2) = 2 9 = 512. Without parentheses, the conventional order of operations for serial exponentiation in superscript notation is top-down (or right-associative), not bottom-up [23] [24] [25] (or left-associative). That is,

3. Order of operations - Wikipedia

   en.wikipedia.org/wiki/Order_of_operations

   Parentheses; Exponentiation; Multiplication and division; Addition and subtraction; This means that to evaluate an expression, one first evaluates any sub-expression inside parentheses, working inside to outside if there is more than one set. Whether inside parenthesis or not, the operation that is higher in the above list should be applied first.

4. Associative property - Wikipedia

   en.wikipedia.org/wiki/Associative_property

   Even though the parentheses were rearranged on each line, the values of the expressions were not altered. Since this holds true when performing addition and multiplication on any real numbers, it can be said that "addition and multiplication of real numbers are associative operations".

5. Symbols of grouping - Wikipedia

   en.wikipedia.org/wiki/Symbols_of_grouping

   For example, in the expression 3(x+y) the parentheses are symbols of grouping, but in the expression (3, 5) the parentheses may indicate an open interval. The most common symbols of grouping are the parentheses and the square brackets, and the latter are usually used to avoid too many repeated parentheses.

6. Algebraic operation - Wikipedia

   en.wikipedia.org/wiki/Algebraic_operation

   Multiplication symbols are usually omitted, and implied, when there is no operator between two variables or terms, or when a coefficient is used. For example, 3 × x 2 is written as 3x 2, and 2 × x × y is written as 2xy. [5] Sometimes, multiplication symbols are replaced with either a dot or center-dot, so that x × y is written as either x ...

7. Expression (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Expression_(mathematics)

   The radical symbol (√) for square root was introduced by Christoph Rudolff in the 1500s, and parentheses for precedence by Niccolò Tartaglia in 1556. François Viète’s New Algebra (1591) formalized modern symbolic manipulation. The multiplication sign (×) was first used by William Oughtred and the division sign (÷) by Johann Rahn.

8. Knuth's up-arrow notation - Wikipedia

   en.wikipedia.org/wiki/Knuth's_up-arrow_notation

   The sequence starts with a unary operation (the successor function with n = 0), and continues with the binary operations of addition (n = 1), multiplication (n = 2), exponentiation (n = 3), tetration (n = 4), pentation (n = 5), etc. Various notations have been used to represent hyperoperations.

9. Operand - Wikipedia

   en.wikipedia.org/wiki/Operand

   The next order of operation (according to the rules) is exponents. Start at the left most value, that is, 4, and scan your eyes to the right and search for the first exponent you come across. The first (and only) expression we come across that is expressed with an exponent is 2 2. We find the value of 2 2, which is 4. What we have left is the ...