1=0.05*ln（x）
    x=0.05*ln（x）
    4x-0.167x^2=132
    x+(10000-x)*0.14<10000
    y-sin(y)*cos(y) = 1.256
    132=4.08x-0.167x^2
    5/8+x=11/12
    s=(5794.838*10^6)/(360*(2900-117.29/2))
    11/15-x=13/30
    x+(10000-x)*0.14>10000
    s=(4911.002*10^6)/(360*(2900-117.29/2))
    b-sin(b)*cos(b) = 0.837333333
    (x÷30)x40+120=2x
    x+(10000-x)*0.14=10000
    x-1/6=1/4
    a-sin(a)*cos(a)=0.2093
    20＝-x∧2+32x-156
    x+(1-x)*0.14=1
    a^3－3a＋2＝0
    （r-65/3）^2+(156/3)^2=r^2

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