1/3×11^3-7×11^2+111×11+50
    arccos0.9625
    （63972000000-65172000000）/65172000000
    （49778000000-50728000000）/50728000000
    （48429000000-56629000000）/56629000000
    200000000*（388.52-2.66）-13200000000
    140000000*（432.76-2.56）-10450000000
    145000000*（398.75-2.55）-9020000000
    log(3,1)+16^(0.5)+(-2)^0
    0.07%/10%
    （65118000000-65172000000）/65172000000
    （50691600000-50728000000）/50728000000
    100×11-11×11-1/3×11^3+7×11^2-111×11-50
    100×1.18-1.18^2-1/3×1.18^3+1.18^7-111×1.18+5×1.18
     1-!(26280)/(26280^4)/!(26280-4)
     1-!(26280)/(26280^3)/!(26280-3)
     1-!(26280)/(26280^2)/!(26280-2)
    !(26280)
     1-!(26280)/(26280^5)/!(26280-5)
    [(250-20×2) +(600-20×2)×2+11.9×8=

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