In mathematics, formula refers to the formula listed in the calculation of numbers (or algebraic expressions), including numbers (or letters instead of numbers) and operation symbols (four operations, power, root, factorial, permutation and combination, etc. ). According to the different calculation methods, the formulas are generally divided into horizontal and vertical.

Only after = can an expression be formed ... (An expression is also called an equation).

A formula for connecting numbers with operational symbols. For example, 5×2÷( 10-9)= 10.

Formula-In mathematics, formula refers to the formula listed when calculating numbers (or algebraic expressions), including numbers (or letters instead of numbers) and operation symbols (four operations, powers, roots, factorials, permutations and combinations, etc. ).

Equation-An equation that represents equality is called an equation.

Expression-a meaningful formula that connects data of the same type (such as constants, variables, functions, etc.). ) according to certain rules, it is called an expression.

By definition, several formulas are all formulas.

2+3 formula

2+3=5 equation

2+3=a+b=6+c is an equation and an arithmetic expression.