write a sequence for the rule.
1. a - 4 = b
2. a +(2-1) = b
3. a - (3-3)= b
4. a +(4 - 3) = b
5. (a + 2) - 2 = b
6. (a + 4) - (2 -1) = b
1. a - 4 = b
2. a +(2-1) = b
3. a - (3-3)= b
4. a +(4 - 3) = b
5. (a + 2) - 2 = b
6. (a + 4) - (2 -1) = b
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