2(2(2x+10)+10)+10>18
    5-1/2(x+4)>=x
    2x-7<3(x-1)
    m≥2(100-m）
    x^3+x^2+x^1>9
    (x+2)/3>(2x-1)5
    （1+4x）/3>x-1
    2015-180<180（n-2）<2015
    (3*sin(x)-6*cos(x)*sin(x)*sin(x))*(cos(x)+2*sin(x)-2)-(2*cos(x)-sin(x)*(3*sin(x)-2*sin(x)*sin(x)*sin(x)))=0 0
    x^2+1>3
    （x+1）x＞0
    （x+1）x＞0
    （x+1）x＞0
    -4114150+3000000-450000+x-x*10%/4>300000
    e^x>ln（x+2）
    1389.91*sqrt(1-x^2)+3196.793x<=1869.2
    X*X<=1
    sqrt（（t-9）^2+16）+t-9≥0.5t+1
    sqrt（（t-9）^2+16）+t-9≥0.5t+1
    sqrt（（t-9）^2+16）+t-9≥0.5t+1

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