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2010-03-10T19:28:31+01:00
2-(-3)+(-4)+6-(7)-9=5+2-7-9=7-16=-9
{-[-(3-4-(5-2))]-6}={-[-(3-4-7)]-6}={-[-8]-6}=-2
{-4-{2(-6+9)}-7}-8={-4-{2+3-7}-8={-4-5-7}-8=-24
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2010-03-10T19:33:52+01:00
2+3-4+6-7-9=7-16= -9
{-[-(-1+3)]-6}=[2-6] =-8
{-4-[-12+18]-7}-8=[-4-6-7]-8= -25
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