Mathematics
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     78*62/64*37/46*27/79*33/65*28/95*66
    arctan0.5
    arctan0.5
    1+1=
    √(7%*(1-7%))=
    √7%*(1-7%)=
    √7%*(1-7%)*15%=
    15%+50000/3000000-8%=
    ((1+2%)*(1+4%))/(1+10.5%)^2=
    ((1+2%)*(1+4%))/(1+10%)^2=
    (300-100)×(1-25%)+60
     [300-(100-60)]×(1-25%)+60
    (300-100)×(1-25%)+60×25%
    [300-(100-60)]×(1-25%)+60×25%
    -2-3=
    -3^2+3^3-3^2
    -3^4/(9/4)+(4/9)/(-2^4)
    abs(-2-1/4)+3/4+1-abs(1-1/2)
    abs(-2+1/4)+3/4+1-abs(1-1/2)
    ^3−2^2−144

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