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2. Order of operations - Wikipedia

   en.wikipedia.org/wiki/Order_of_operations

   If each subtraction is replaced with addition of the opposite (additive inverse), then the associative and commutative laws of addition allow terms to be added in any order. The radical symbol √ is traditionally extended by a bar (called vinculum) over the radicand (this avoids the need for parentheses around the radicand). Other functions ...

3. One-step method - Wikipedia

   en.wikipedia.org/wiki/One-step_method

   is used. This well-known method was published by the German mathematician Wilhelm Kutta in 1901, after Karl Heun had found a three-step one-step method of order 3 a year earlier. [19] The construction of explicit methods of even higher order with the smallest possible number of steps is a mathematically quite demanding problem.

4. Parker–Sochacki method - Wikipedia

   en.wikipedia.org/wiki/Parker–Sochacki_method

   The method requires only addition, subtraction, and multiplication, making it very convenient for high-speed computation. (The only divisions are inverses of small integers, which can be precomputed.) Use of a high order—calculating many coefficients of the power series—is convenient.

5. Arithmetic - Wikipedia

   en.wikipedia.org/wiki/Arithmetic

   Counting is a type of repeated addition in which the number 1 is continuously added. [46] Subtraction is the inverse of addition. In it, one number, known as the subtrahend, is taken away from another, known as the minuend. The result of this operation is called the difference. The symbol of subtraction is . [47]

6. Addition - Wikipedia

   en.wikipedia.org/wiki/Addition

   Repeated addition of 1 is the same as counting (see Successor function). Addition of 0 does not change a number. Addition also obeys rules concerning related operations such as subtraction and multiplication. Performing addition is one of the simplest numerical tasks to do.

7. Algebraic expression - Wikipedia

   en.wikipedia.org/wiki/Algebraic_expression

   In mathematics, an algebraic expression is an expression built up from constants (usually, algebraic numbers) variables, and the basic algebraic operations: addition (+), subtraction (-), multiplication (×), division (÷), whole number powers, and roots (fractional powers).