Mathematics
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    77*4.2*1000*0.44
    sin68
    arccos0.37
    sin27
    arccos0.89
    3052*1.55*1.5+2500*1.55*1.5
    (1383+1200)*1.7/0.5*1.35
    (2351+1200)/0.5*1.35
     (1500+1200)*3*1.4/1.7
    180-38.604041-51.395977
    arctan(10.148061÷12.710425)=
    arctan(12.710425÷10.148061)
    arctan(10.148061÷12.710425)=
    arctan(10.148061÷12.710425)=
    tan(arccos 0.88)-tan(arccos 0.92)
    2^(E-127)
    12×125
    12÷8
    (cos(π/6))^3
    sin(π/6)^3

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