Sets of numbers and whole equations can be represented with letters

Sets of numbers and whole equations can be represented with letters, too.Other symbols are used to represent operations.Some of these are especially valuable as shorthand because they condense repeated operations into a single expression.The repeated addition of the same number is abbreviated with a multiplication sign so it doesn't take up more space than it has to.A number multiplied by itself is indicated with an exponent that tells you how many times to repeat the operation.