arcsin(0.672)
    arcsin(0.6767/0.94)
    arcsin(0.64/0.74)
    cos120
    2^100
    148*100/67/1/149*100=
    110*100/41/1/149*100=
    47*100/41/1/149*100=
    148*100/67/1/140*100=
    17725×0.5/4
    5*4*9*7
    42.81+147.81
    0.01*0.144552
    1022.52*0.144552
    (850+110+10+21.5+31.02
    [（1+0.31）^0.5-1]
    42.5+[（1+0.31）^1-1]
    353.05/0.93612
    1-0.06388
    0.01+0.0002+0.0008+0.05288

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