Mathematics
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    3198356/(3198657-2772179)
    12*(1-0.975045)*10^3/(0.0549*2.36)
    12*(1-0.975045)*10^3/(0.0549*2.34)
    12*(1-0.9750)*10^3/(0.0549*2.34)
    10/(1+20%)+12/(1+20%)^2+17.28/(1+20%)^3+19.01/(1+20%)^4+21.08/(1+20%)^5+52.45/(1+15%)
    3633/25/0.865
    145*25+8
    145/0.865
    3633/25
    70% ×6/7-80% ×3/8
    666*5
    arccos664.7732463
    -arctan(1/3)
    arctan-0.33333333
    arctan-1.333
    arctan176/132
    arccos44/132
    arctan44/132
    22*sin(-53.1)
    22*sin53.1

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