16x=15500
    2.6x=1100-x
    8229/0.158
    X×2.6=1100-x
    0.00045/0.158
    X*2.6=1100-x
    3[x-2(x-2）]>x-3(x-2) (3x-2)/3-(9-2x)/3≤(5x+1)/2
    0.12=1211.56*d*d*d*d*d
    （46.96-30）/（x-67500）=（50-46.96）/（55800-x）
    13+x=26
    sinx+tanx=2sqrt(2)
    7.9sin(4x)=7.7
    3(y+2)-1≥8-2(y-1) m/3-(m-1)/2<1
    3(y+2)-1≥8-2(y-1)
    (2+x)/2≥(2x+1)/3
    3x+2<2x-5 x-4>-6
    exp(2)^x=0
    exp(2)-x=0
    4723.70=(5000*0.044/2)*(1/x)*(1-1/(1+x)^16)+5000/(1+x)^16
    x^3-(13/75)x-(1/30)=0

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