Simplify a - {b - [c - (d - e) - f] - g}.
1 answer:
The key is to work from the middle.
c - (d - e) - f = c - d + e - f
b - (c - d + e - f) - g = b - c + d - e + f - g
a - (b - c + d - e + f - g) = a - b + c - d + e - f + g
Answer:
a - b + c - d + e - f + g
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