log(1/sin0,2)
    arccos(0.001676)
    e(1/sin0)
    ln(1/sin0)
    lntan90
    tan(0.001676)-0.001676
    sqrttan90
    1/(1-cos1)
    1/ln1
    1500*360
    35*12 +(25+95)*(12-3)
    ［3512 +(25+95)(12-3) ］
    1850000 *4
    155*4*360*12*2
    25+95+35
    360*24
    1500000/360*24
    60.34*0.8*0.9
     60/72.6 *81.12* 0.9
    5300.381*0.8*0.9

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