Mathematics
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    -4^2-16÷(-2)×1/2-(-2)^3
    -4^2-16÷(-2)×1/2-(-2)^3
    -4^2-16÷(-2)×1/2-(-2)^3
    12.56/720
    arccos2.5/2.6
    arccos2.5/2.4
    arccos3/2.04
    A(3,2) A(3,2) A(3,9)
    A(3,2)
    1÷㏒10
    1/e
    -2*80*80+340*80-12000
    4115226337448559670781893×27
    1/8.1
    6943319*2791*9
    arctan1
    arctan-1
    arctan-1
    964.66×[1-1/(1+8.0%)^49.1]=
    cos(10π-π/4)

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