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-(-(-(-2))) is not a question, so it has no answer.
But if you'd like to clean it up and make it look less ugly, then you should notice that there are 4 minus-signs operating on the '2'. Every two minus-signs cancel each other, so 4 of them definitely result in total annihilation of all the minus-signs, and the whole revolting expression is equal to just 2 .
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