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Symbols of grouping, or signs of aggregation, are the parentheses
( ), brackets [ ], braces { }, and the bar —, also called a vinculum. Each symbol means that the terms enclosed are to be treated as a single term.
Q. Simplify the following expressions.
Note: Start simplifying with the innermost grouping and work outwards.
a) 4[2(x+1)+3]
b) a+4[3+2(b−3)]
c) 2{[(1−m)+(n+3)]−5}−4
d) {[3−(x+7)]−3x}−(x+7)
