96.5/9800
    162.3/9800
    162.3/9.8
    18.8/96.5
     (π*47.4^2*18.5)/4
     (π*47.4^2*18.1)/4
     (π*47.5^2*19)/4
    （π*47.4^2*18.8）/4
    （π*50.6^2*27.7）/4
    arcsin(2)
    arcsin(0)
    arcsin(1)
    !(2.7)
    tan1.5707963267948966192313216916398
    299792.458*31557600
    299792458*31557600
    sin0.9024695=
    1-（sin3.609878）/3.609878=
    （1-（sin3.751）/3.751）^（2/3）=
    (-5)×8×(-0.5)

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