1999乘19981998减1998乘19991999=?
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1999乘19981998减1998乘19991999=?
1999乘19981998减1998乘19991999=?
1999乘19981998减1998乘19991999=?
1999*19981998-1998*19991999
=1999*1998(10001-10001)
=0
0
tyfrttyfdtufgftfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfggfgfgfgfgfggfggfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgffgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgffggfgffggfffgfgfgffgfgfgfgfg...
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0
tyfrttyfdtufgftfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfggfgfgfgfgfggfggfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgffgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgffggfgffggfffgfgfgffgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgfgffgfgfgfgfgfgfgfgfgfggfgfgfgfgfggffgfgfgfgfffgfgfgfffffffgfgfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
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