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2a - [4b - {4a - (3b - 2a + 2b)}]
We remove the vinculum which causes the "+ 2b" to become "- 2b":
2a - [4b - {4a - (3b - 2a - 2b)}]
We combine like terms inside the parentheses:
2a - [4b - {4a - (b - 2a)}]
We remove the parentheses, causing the "- 2a" to become "+ 2a"
2a - [4b - {4a - b + 2a}]
We combine like terms inside the braces:
2a - [4b - {6a - b}]
We remove the braces, causing the "- b" to become "+ b"
2a - [4b - 6a + b]
We combine like terms inside the brackets:
2a - [5b - 6a]
We remove the brackets, causing the "- 6a" to become "+ 6a":
2a - 5b + 6a
We combine like terms:
8a - 5b
Edwin
