The symbols used to enclose a group of symbols or numbers that are to be taken together. Brackets can be nested so that the whole contents of the inner bracket is treated as a single term in the larger bracket. Brackets can be used to change the order in which operations are to be done. For example, 7×2+3 will be 14+3=17. If the sum intended is 7×5=35 then brackets can be put round 2+3 so that the sum is taken before the product, i.e. 7×(2+3).