10*sinx*cosx<0.2
    4a^3-4a^2+4a+13≤0
    a-16*a^0.5+16<0
    (x^2-x-2)*(x^2-2x-8)<0
    (x^2-3x)*(x^2-2x-8)<0
    (x-x-2)*(x-2*x-8)<0
    5+15x<2x-2
    12.5x^2+100x+25>0
    m－3<0
    4×4^x-5×3^x≥2
    -6x^2-5x-1＞0
    x^2/（6-2x）^2≥10^-8.98
    cos(x)*(0.1*1.28*sin(x)-0.1*cos(x)*0.1*1.28)>0.1*1.28*0.5
    cos(x)*(0.5*1.28*sin(x)-1*cos(x)*0.5*1.28)>0.5*1.28*1
    cos(x)*(0.5*1.28*sin(x)-0.5*cos(x)*0.5*1.28)>0.5*1.28*0.5
    27x*(50-x)+40x≤1500
    cos(x)*(1/2*0.128*sin(x)-0.5*cos(x)*1/2*0.128)<1/2*0.128*0.5
    cos(x)*(1/2*0.128*sin(x)-0.5*cos(x)*1/2*0.128)＞1/2*0.128*0.5
     ( 0.7602 + 0.1 * x * 0.7602 )< ( 0.5247 + 0.1 * x * 0.5247 ) *2
    (0.7602+0.1*x*0.7602)/(0.5247+0.1*x*0.5247)<2

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