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8*(((1-3)^2)/4)-2^2+8 = 0
8*(((-2)^2)/4)-2^2+8 = 0
8*((2^2)/4)-2^2+8 = 0
8*(4/4)-2^2+8 = 0
1*8-2^2+8 = 0
8-2^2+8 = 0
8-4+8 = 0
4+8 = 0
12 = 0
L <> R
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