There are established concepts in mathematics. This dictionary clarifies the meaning of these concepts. Words are not necessarily in alphabetical order.[br][br][b]Cancelling[/b]: Divide the numerator and denominator of a fraction by the same number. For example, 4/8 is reduced to 1/2.[br] [br][b]Equation[/b]: Equation refers to the equality of two expressions.[br][br][b]Expanding[/b]: Multiply the numerator and denominator of a fraction by the same number. For example, 1/2 is widened to 2/4.[br][br][b]Expression[/b]: An expression is a combination of numbers, arithmetic, and letters.[br][br][b](Calculation) operation[/b]: Operation refers to a calculation operation. These include addition, subtraction, multiplication, and division. Also increasing the power or taking a root are called as calculation operations.[br] [br][b]Power[/b]: Power is an abbreviated marking method for multiplication of the same term. For example: [math]5\cdot 5 \cdot 5 = 5^3.[/math] [br] [br][b]Simplifying[/b]: The expression is written in as simple a form as possible. For example, the expression [math]x + y + x+ y+x[/math] is simplified to [math]3x+2y.[/math][br][b]Term[/b]: The term is a part of an expression. For example, in an expression [math]2x^3-x[/math], terms are both [math]2x^3[/math] and [math]x.[/math] In the expression [math](2x-1)(2-x)) , [/math] [math] 2x-1[/math] and [math]2-x.[/math] are terms. [br] [br][b]Variable[/b]: A variable describes an unknown value. It is usually denoted by a letter in expressions. It is attempted to be solved with the help of mathematics.[br] [br][br] [br][br][br][br]