2√3+1
    (2√3+1)^2+1^2
    0.14×2/7=
    1.2×5/8=
    0.14×2/7=
    3/4×1.2=
    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=

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