Collecting like terms means to simplify terms in expressions in which the variables are the same. In the expression \(5a + 2b + 3a - 6b\), the terms \(5a\) and \(+ 3a\) are like terms, as are \(2b\) ...
Expanding brackets means multiplying everything inside a bracket by the term or expression immediately in front of the bracket. For example, in the expression \(3(m+7)\)both \(m\) and 7 must be ...
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