-8 - (-12)= -8 + 12 = 4
(1\2-3)2+2(1\2-3)(1\2+2)=2\2-6+2(1\4+1-3\2-6)= -5+50\4=30\4
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-8 - (-12)= -8 + 12 = 4
(1\2-3)2+2(1\2-3)(1\2+2)=2\2-6+2(1\4+1-3\2-6)= -5+50\4=30\4