3/4×1.2=
    2.4×5/6=
    2023×2023/2024
    arcsin0.982
    arcsin0.84
    arcsin0.982
    142857×7
    12+6.8+5.5=
    （71+13.7+105+55.5）/36=
    cos5
    （54*12.26+109*12.93）/7.98=
    222-105-8=
    220.5-55.5-111=
    255.6*7.98/3/12.26=
    255.6*7.98*2/3/12.93=
    （200*8-61*8.17-71*13.02）/12.93=
    200*8-61*8.17-71*13.02=
    √53.6*2/9.8
    arccos0.495867768
    arccos0.495867768

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