（99-72）/(72-62)=(100-T)/(T-86)
    (70-28)/(28-56)=(70-T)/(T-56)
    (38.5-33)/(33-27) = (55-T)/(T-41)
    (29-24)/(24-19) = (55-T)/(T-41)
    (99-81)/(81-67) = (100-T)/(T-86)
    (50.5-41)/(41-39)=(70-T)/(T-56)
    (41-40)/(40-30)=(70-T)/(T-56)
    (48-32)/(32-28)=(70-T)/(T-56)
    (41-28)/(28-24)=(70-T)/(T-56)
    √4x=8
    tanx=0.131
    x*8=16
    x*tanx=0.131
    （X-7%）/（8%-7%）=(2.6086-2.6243)/(2.5771-2.6243)
    X-7%/8%=(2.6086-2.6243)/(2.5771-2.6243)
    (20x+10(50-x))*0.8=560
    200√（x*x+100）√（x*x+1）/（x√（x*x*0.01+1）√（x*x+25）） = 1
    200√（x*x+2500）√（x*x+1）/（x√（x*x*0.01+1）√（x*x+25）） = 1
    -x^2-2.5x+3.5=0
    200√（x*x+2500）√（x*x+1）/（x√（x*x*0.01+1）√（x*x+400）√（x*x+9）） = 1

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