arctan0.49
    616÷47/44
    17*13*11
    0.02+0.024+0.024
    13.39➗28
    711减575
    711减去115
    -5.4365598×10^(-11)×295^4+1.9227014×10^(-7)×295^3-1.1415× 10^(-4)×295^2+1.0267×295
    3.12×9.978×10^4
    568➗27
    6762➗13
    0.285E^（1.5）+0.005E^（2.5）
    0.285E^（1.5）+0.005E^2.5
    sin11.5
    sin7
    sin5.5
    sin（5.5）
    3.14×（80÷2÷100）²×15
    12000*100+12000/56569*40+56569/2*3%*100
    1/8×299×21^2+1000×21/4+1000×20/21×0.53

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