(x+2）/ln((40.3+2)/(40.3-x)) =37.417
    3*s^2+4*s+1 = 0
    (x+2）/ln((40.3+2)/(40.3-x)) =39.297
    1*s^3+0*s^2-3*s+1 = 0
    200（x-3）=5（x-150）
    200（X-3）=（X-150）x5
    x^0.14-x^0.04=0.05
    29x^(2)-150x+193＝0
    (x+2）/ln((40.3+2)/(40.3-x)) =41.201
    (abs(x-112.5)-0.5)^2/112.5+((abs(150-x)-37.5-0.5)^2/37.5=0.00392
    (x+2）/ln((40.3+2)/(40.3-x)) =41
    (x+2）/ln((40.3+2)/(40.3-x)) =40
    (x+2）/ln((40.3+2)/(40.3-x)) = 42
    59x^(2)-150x+217＝0
    (x+2）/ln((40.3+2)/(40.3-x)) =38.9
    20lg(15/(x*(x^2+1)^0.5))=-5.75
    (x+2）/ln((40.3+2)/(40.3-x)) =43.696
    1*s^3+2*s^2+1*s = 0
    (48+x)/(48-x)=e^(2x）
    2x^(2)+3x-1=0

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