The term difference equation sometimes and for the purposes of this article refers to a specific type of recurrence relation. Step 4 Addition and Subtraction. In mathematics a recurrence relation is an equation that recursively defines a sequence or multidimensional array of values once one or more initial terms are given.
The top priority is your parenthesis then exponents followed by multiplication and division and finally addition and subtraction PEMDAS.
When people are solving a problem with more. What part should you calculate first. Mathematicians have agreed on a correct order to use operations and it is very important that they know these rules. 7 6 5 2 3.