1. Combine like terms: -a + a + a + a - a - a + a - a - a
2. Group and simplify: (-a + a) + (a - a) + (a - a) + (a - a) + a = 0 + 0 + 0 + 0 + a = a
Thus, the simplified expression is: 0
Frequently asked questions (FAQs)
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