The grouping of algebraic terms using parentheses plays a major role in how an expression gets evaluated. **Symbols of grouping** used in mathematical expressions include **parentheses** ( ), **brackets** [ ], and **braces** { }, and they all serve the same common purpose, that is, the terms they enclose are to be treated as a single term. Apart from that, they give an expression a sense of hierarchy, allowing a group of terms to be nested within another group. For instance, the innermost group of terms are always placed inside parentheses âˆ’ these terms get evaluated first. The group containing the first group and all other terms are contained is square brackets. And, if there’s a third group, all preceding groups are placed within curly brackets. The example shown below shows the three *signs of segregation* discussed:

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Note that if the +6 wasn’t added to the equation, the curly brackets (braces) wouldn’t be required. The two videos below explore how these symbols are dealt with when it comes to multiplying and simplifying polynomials.