-8-98-998-9998-99998

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-8-98-998-9998-99998-8-98-998-9998-99998-8-98-998-9998-99998-8-98-998-9998-99998=(2-10)+(2-100)+(2-1

-8-98-998-9998-99998
-8-98-998-9998-99998

-8-98-998-9998-99998
-8-98-998-9998-99998
=(2-10)+(2-100)+(2-1000)+(2-10000)+(2-100000)
=10-10-100-1000-10000-100000
=-111100

-8-(100-2)-(1000-2)-(10000-2)-(100000-2)
=-8-100+2-1000+2-10000+2-100000+2
=-111100

-(100000+10000+1000+100+10)-(2×5)
=-111110-11
=-111099