A(sinx,cosx)＞1
    n/2n+1>12/25
    A(x-2,x)≤C(x,x+2)
    A(x-2,x)＞C(x,x+2)
    A(x-2,x)＞C(x,2x)
    x^2-2x+1<=0
    4h^2+20h+9<=0
    x*x-8x+15<0
    x*x-29*5x+900*5<0
    4-x2>0
    x^2-5x+4>≥0
    64-32m+4m*m-4m<0
    0>v*v-89v+1600
    16（a*a-3）＜（1+a*a）(a*a+1)(3*a*a+39)
    -2x+3>0
    m^2+19m-42<0
    85%z+90%（800-z）≥800×88%
    x^2-3x＞216/x
    0
    (x+3)/(x^2-x+1)>=0

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