arccos0.8635
    arccos0.8125
    arccos0.8125
    arccos0.7615
    arccos0.7210
    arccos0.6765
    arccos0.6765
    10063 ×50×3142/(4357+10731)
    10063 ×50×7071/(4357+10731)
    10063 ×50×421/(4357+10731)
    10063 ×50×97/(4357+10731)
    10063 ×50×554/(4357+10731)
    10063 ×50×3803/(4357+10731)
    2*3*5*7
    arcsin(0.900/1.660)
    （3.66×7.26×2+3.36×7.26×2）
    （3.9+0.45+3×9）×164.76+（163.8-18.3）×1.4+（3.6+4.14+3.6）×3.4+7.2×4.5-92.37-110.28-111.18×8-1.8
    sin(-7/6π)
    sin(-7/6π)
    1/(0.025/(4578×0.02)+0.000344 0.025/0.020+(0.0025×0.025)/(45×0.0225)+0.000172+1/290)

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