<Dd> 1 + 2 3 + 4 + 5 = 3 7 + 5 . (\ displaystyle (\ frac (1 + 2) (3 + 4)) + 5 = (\ frac (3) (7)) + 5 .) </Dd> <P> For ease in reading, other grouping symbols, such as curly braces () or square brackets (), are often used along with parentheses (). For example: </P> <Dl> <Dd> ((1 + 2) − 3) − (4 − 5) = (3 − 3) − (− 1) = 1 . (\ displaystyle ((1 + 2) - 3) - (4 - 5) = (3 - 3) - (- 1) = 1 .) </Dd> </Dl> <Dd> ((1 + 2) − 3) − (4 − 5) = (3 − 3) − (− 1) = 1 . (\ displaystyle ((1 + 2) - 3) - (4 - 5) = (3 - 3) - (- 1) = 1 .) </Dd>

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