-(-(-(-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 .