77*r*r/100/14.50=0.366*50*24*(lg(r)-lg0.175)
    77*r*r/100/14.50=0.366*50*24*(lg(r)-lg0.175)
    77*r*r/100/14.50=0.366*60*24*(lg(r)-lg0.175)
    77*r*r/100/14.50=0.366*60*24*(lg(r)-lg0.175)
    77*r*r/100/14.50=0.366*60*24*(lg(r)-lg0.175)
    77*r*r/100/14.50=0.366*60*24*(lg(r)-lg0.175)
    77*r*r/100/14.50=0.366*60*24*(lg(r)-lg0.175)
    77*r*r/100/14.50=0.366*60*24*(lg(r)-lg0.175)
    77*r*r/100/14.50=0.366*50*24*(lg(r)-lg0.175)
    77*r*r/100/14.50=0.366*80*24*(lg(r)-lg0.175)
    0.122725=0.19032*exp(-x/2.37898)+0.0607*exp(-x/23.15175)-0.00557
    0.238105=0.27807*exp(-x/0.37572)+0.18499*exp(-x/5.21)+0.01315
    0.120338799=0.19303*exp(-x/2.58372)+0.04844*exp(-x/25.7806)-0.000792402
    0.236905=0.27587*exp(-x/0.37854)+0.18479*exp(-x/5.21841)+0.01315
    0.75=0.5+(x-50)*0.05-20*0.05
    （x-609.6）*79953.32/x=64.38
    79953.32-609.6*79953.32/x=（x-609.6）*79953.32/x
    -5t^2+40t-60=0
    5t^2+40t-60=0
    （30-x-5）*（300+20x）=7820

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