(-191919*9898+989898*1919)/(-1/2+3.14)

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(-191919*9898+989898*1919)/(-1/2+3.14)

(-191919*9898+989898*1919)/(-1/2+3.14)
(-191919*9898+989898*1919)/(-1/2+3.14)

(-191919*9898+989898*1919)/(-1/2+3.14)
(-191919*9898+989898*1919)/(-1/2+3.14)
=(-19*10101*98*101+98*10101*19*101)/(-1/2+3.14)
=0/(-1/2+3.14)
=0
成功!
加油!

原式=-(19*10101*98*101-98*10101*19*101)/-0.5+3.14
=-0/2.64
=0