arcsin2
    arcsin50
    （2600/（10+16）*10+2360/（60+58）*60+17600/（120+40）*120+4080/（90+46）*90）/500+12+24
    （2600/（10+16）*16+2360/（60+58）*58+17600/（120+40）*40+4080/（90+46）*46）/400+10+22
    （2600/（10+16）*10+2360/（60+58）*60+17600/（120+40）*120+4080/（90+46）*90）/400+12+24
     2600/（10+16）*16+2360/（60+58）*58+17600/（120+40）*40+4080/（90+46）*46+10+22
    2600/（10+16）*10+2360/（60+58）*60+17600/（120+40）*120+4080/（90+46）*90+12+24
    arcsin1
    [1-1/(1+6.5%)^28.56]/ [1-1/(1+6.5%)^32.06]
    [1-1/(1+6.5%)^28.56]/ [1-1/(1+6.5%)^33.10]
    [1-1/(1+6.5%)^28.56]/ [1-1/(1+6.5%)^32.60]
    （ln0.08）/3.1415926
    ln（0.08）/2
    1+1
    log(1400,2)-6
    log(120/3,2)
    log(1400/3,2)
    -log(1/60,2)
    2log(2.8,2)
    2log2.8(2)

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