2=1.9136x-22.369
    2=1.6467x-16.854
    2=3.0705x-72.533
    2=1.5412x-27.884
    2.400*(f+f-1.40)+-0.399*(f-1.40+f--5.35)+6.060*(f--5.35+f--1.77)=6*140*195*2/1000
    0.813*(f+f-0.48)+1.341*(f-0.48+f-14.10)+6.060*(f-14.10+f-17.51)=6*140*195*2/1000
    1.603*(f+f-0.94)+0.399*(f-0.94+f-7.59)+6.060*(f-7.59+f-11.05)=6*140*195*2/1000
    x*99.975%-120.467*100.025%=1/10
    x/620=（1000-x）/580+1.4
    （480*63-x）*0.85+18*63=26484.77
    （26.274+x）×1.35＝52.549+70.623-x
    （26.274+x）×1.55＝52.549+70.623-x
    （26.274+x）×1.75＝52.549+70.623-x
    （26.274+x）×1.975＝52.549+70.623-x
    （26.274+x）×1.95＝52.549+70.623-x
    （26.274+x）×2.15＝52.549+70.623-x
    （26.274+x）×2.35＝52.549+70.623-x
    （26.274+x）×2.35＝52.549+70.623-x
    x^2-(1/√3)*x-(2/3)=0
    -2*（1-x^2）/(1-X)=4

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