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2. Free variables and bound variables - Wikipedia

   en.wikipedia.org/wiki/Free_variables_and_bound...

   A free variable is a notation (symbol) that specifies places in an expression where substitution may take place and is not a parameter of this or any container expression. The idea is related to a placeholder (a symbol that will later be replaced by some value), or a wildcard character that stands for an unspecified symbol. In computer ...

3. Expression (mathematics) - Wikipedia

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

   An expression is often used to define a function, by taking the variables to be arguments, or inputs, of the function, and assigning the output to be the evaluation of the resulting expression. [5] For example, x ↦ x 2 + 1 {\displaystyle x\mapsto x^{2}+1} and f ( x ) = x 2 + 1 {\displaystyle f(x)=x^{2}+1} define the function that associates ...

4. Algebraic expression - Wikipedia

   en.wikipedia.org/wiki/Algebraic_expression

   The roots of a polynomial expression of degree n, or equivalently the solutions of a polynomial equation, can always be written as algebraic expressions if n < 5 (see quadratic formula, cubic function, and quartic equation). Such a solution of an equation is called an algebraic solution.

5. Elementary algebra - Wikipedia

   en.wikipedia.org/wiki/Elementary_algebra

   They may also be performed, in a similar way, on variables, algebraic expressions, [6] and more generally, on elements of algebraic structures, such as groups and fields. [7] An algebraic operation may also be defined more generally as a function from a Cartesian power of a given set to the same set.

6. Variable (mathematics) - Wikipedia

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

   Therefore, in a formula, a dependent variable is a variable that is implicitly a function of another (or several other) variables. An independent variable is a variable that is not dependent. [19] The property of a variable to be dependent or independent depends often of the point of view and is not intrinsic.

7. My Husband's Grandpa Cracked the Code to the Best-Ever ... - AOL

   www.aol.com/lifestyle/husbands-grandpa-cracked...

   In a large bowl using an electric mixer, cream the sugar and butter until the mixture is fluffy and lighter in color, about 5 minutes. Add the eggs, one at a time, beating to blend after each ...