R*ln(2*11/R)-325/1500=0
    X/87-(95-X)/1000=0.238
    （26.307+x）×1.95＝52.613+70.22-x
    （26.307+x）×2.95＝52.613+70.22-x
    X/200+(54.5-X)/1000=0.065
    （26.307+x）×2.75＝52.613+70.72-x
    （26.307+x）×2.95＝52.613+70.72-x
    20/135+X/87-(75-X)/1000=0.238
    22/135+X/87-(95-X)/1000=0.238
    8.04x^3+115.48x^2-102.3x
    98/sin（x）=134/sin（18-x）
    98/sin（x/180*3.14)=134/sin（(18-X)/180*3.14）
    7.3/87-35/2000-40/1650+X/126=0.00245（X+82.3）
    z^2 + -0.9797z + -0.0160=0
    （26.307+x）×2.25＝52.613+71.22-x
    （26.307+x）×2.55＝52.613+71.22-x
    （26.307+x）×2.35＝52.613+71.22-x
    （26.307+x）×2.15＝52.613+71.22-x
    11.93×c=（3.4+c）×7.98
    （26.307+x）×1.95＝52.613+71.22-x

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