tan(arccos 0.85)-tan(arccos 0.92)
    e-0.95
    sec（0.03311529422）=
    tan(arccos0.87)-tan(arccos0.92)
    arccos0.406
    arc cos0.406
    910*1.22+110+150
    292*1.14+42+150
    416*1.14+60
    ln(C(3,1)C(5,2)/C(8,3))
    ln(!(2023))-(2023+1/2)ln2023+2023
    ln(!(2023))-(2023+1/2)ln2023+2023
    12000*60^3+9000*80^3/（60+80）^3+3/140*（1/12000*60+1/9000*80）^-1
    9000*60^3+9000*60^3/（60+60）^3+3/120*（1/9000*60+1/9000*60）^-1
    1000052+52488662÷552-428855÷556
    559*1.14+156+150
    486*1.14+136+150
    538*1.14+150+150
    572*1.14+160+150
    0+360×14726×(1530-135)

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