(3822+3734)*1.2*0.5
    1639344262295081967×13
    1/61
    1639344262295081967×19
    (3822+3734)*1.2
    2*2.69+1.8*2+3+1
    3822*1.2*0.75/15/100+0.4
    3822*1.2/15/2/100+0.4
    3822*1.2/30/2/100+0.4
    1+（39763/30+3822/60）/{0.9[8190/60+3200/60*8]}
    1+（39763/30+3822/60）/{0.9[8190/60+3200/60*7]}
    1+（39763/30+3822/60）/{0.9[8190/60+3200/60*6]}
    1+（39763/30+3822+3734）/{0.9[8190/60+3200/60*5]}
    （39763/30+3822+3734）/{0.9[8190+3200*5]}
    212-7920/63+200
    arctan√10
    arctan（√10）
    arccos（-0.75）
    √((47.85/280)^2+(47.85/160)^2 )
    (240.5×10^3)/(1×π×80^2/4)

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