(-191919*9898+989898*1919)\(-1\2+3.14帮帮忙

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(-191919*9898+989898*1919)\(-1\2+3.14帮帮忙
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(-191919*9898+989898*1919)\(-1\2+3.14帮帮忙
(-191919*9898+989898*1919)\(-1\2+3.14
帮帮忙

(-191919*9898+989898*1919)\(-1\2+3.14帮帮忙
=[-(190000+1919)*9898+(980000+9898)*1919]\(-1\2+3.14 )
=[-190000*9898+980000*1919]\(-1\2+3.14 )
=[-190000*(9800+98)+980000*(1900+19)\(-1\2+3.14 )
=(-190000*98+980000*19)\(-1\2+3.14 )
=0\(-1\2+3.14 )
=0