Mathematics
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    0.670700*(1+0608164)=
    0.01163317+0.09% (-1.4618541) +2.13268966*1.23%+(-2.8178711) *(-1.60%)
    0.670400*(1+0.08169) =
    0.011656628+0.09%(-1.464949545)+2.133905786*1.23%+(-2.81892344)*(-1.60%)=
    ln8
    4^5
    (8,2) (6,1) (5,0) (1,0)
    arcsin0.5
    sin30
    sin60
    arctan1
    1/(1+e^(-0.81))
    1/(1+e^(-0.25))
    1/(1+e^(0.01))
    1/(1+e^(0.25))
    (1.457227*3+1.457227*2)/2=
    2cos2+sin2
    3354000000+372666667-622500000
    3354000000+372666667-82500000
    909720000+101080000-146250000

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