Each formula has its own numbering, which is written in Arabic numerals and placed at the end of the line in parentheses.

Formulas that are longer than the paper writing websites page width should be moved to another line according to certain rules.

The correct carry is that when the formula reaches the end of the line, its carry should be done on mathematical signs ("+", "-" and "="); the sign should be duplicated from the next new line.

If the formula ends with a multiplication sign at the end of the line, its spelling is reflected by the symbol "x" instead of a dot or an asterisk. And the designation of this mathematical sign must be identical throughout the scientific work.

If it is necessary to give long explanations to a formula, and if it contains too long numerator or denominator, it should be designated by one short symbol (as a rule, a letter is used), and then decode it immediately after writing the whole formula.