**In math, brackets are used to group numbers and expressions together and to represent multiplication in expressions that already contain parenthesis.** If expressions contain brackets, the numbers within the parenthesis are evaluated first, and then the numbers inside the brackets are evaluated.

For example, 2[10 – 2(6 – 3)] means that first the 6 - 3 in the parenthesis is evaluated giving the expression 2[10 - 2(3)]. The parenthesis represent multiplication, so 2 x 3 is evaluated leaving 2[10 - 6]. Then, the subtraction in the brackets is completed for 2[4]. Finally, the multiplication signified by the brackets is completed for a solution of 8.