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no subject
0 = 0
0 = 0 + 0 + 0 + ....
0 = (1 - 1) + (1 - 1) + (1 - 1) + ....
0 = 1 + (-1 + 1) + (-1 + 1) + ....
0 = 1 + 0 + 0 + 0 ....
0 = 1