Mathematics
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    [5096×(1+0.0252)×1.0×1.0+0]×0.8973
    [1-1/(1+9.0%)^23.56]/[1-1/(1+9.0%)^40]
    3206.6*(1+0.025)^26
    9.8705*(1+0.0115)^26
    lg15
    lg2.38
    sin35.3
    arctan3.81
    (2√3+4)^2=
    -arctan7
    -arctan5
    -arctan3
    -arctan2
    -arctan1.5
    -arctan1
    -arctan0.5
    -arctan0.2
    1-1
    10×12+2×4+10+18×2×2.5+10×5
    10×12+2×4+10

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