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Equations are centered on the page and labeled with Arabic numerals, right-aligned, in parentheses, and referred to only by those numbers in the text ? e.g., you should always say ?as seen in (3)? rather than ?as seen in Equation (3)?.

The dominant philosophy in most mathematical writing is to only number equations that are referred back to within the paper/article/note/book, or to number particularly important equations.

Equations should be numbered consecutively beginning with (1) to the end of the paper, including any appendices. The number should be enclosed in parentheses and set flush right in the column on the same line as the equation. It is this number that should be used when referring to equations within the text.

How do I write equations and formulas? Center each equation or formula on a separate line. If more than one line in length, the equation should be broken at the end of a unit, as before a plus or minus sign. Place all of the equation on a single page. Allow four lines above and below the equation.

Provide some vertical space above and below the equations that are displayed in separate lines. Equations are regarded as being a part of the text, and are punctuated ingly. If it is the end of a sentence, there should be a period at the end of the equation; otherwise put a comma at the end of it.

Equations should be referenced within the text as "Eq. (x)." When the reference to an equation begins a sentence, it should be spelled out, e.g., "Equation (x)." Formulas and equations should be created to clearly distinguish capital letters from lowercase letters.

Start by making a list of what each variable represents. If you are taking notes on the paper, highlight each of the variables in the equation. Each variable should be described in the text surrounding the equation. Usually one of the variables, the output variable, will be alone on one side of an equals sign.