cos20.483
    cos13.536
    acos0.97222222
    acos0.97541
    acos0.9754
    tan20.483
    arctan20.483
    arctan0.373544
    200*4.725939*10/(0.2*50000)
    200*4.725939*10/(0.2*50)
    200*4.725939*10000000/(0.2*50000)
    200*4.725939*10000000/(0.2*50)
    11714.25+2000
    920+22.69+950+215.87+52+1840+48.17+28.5+950+191.67+16.2+920+103.52+992+58.52+172.75+21.5+472+597+991+9×50×2+7×50×2+533.61+17.25+15.25
    （180+50）×4+22.69+30
    （180+50）×4+215.87+10+30+12
    （180+50）×4=
    （180+50）×4+48.17+28.5+30
    （180+50）×4+191.67+16.2
    （180+50）×4+103.52+16+46+14

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