0＜a^2＜12
    0
    arcsin(140/m)<=arctan(1/0.7)
    4（sina）^3-2（sina）+3＞0
    c<3c-6
    -x2+10x-24<0
    1-2/3(x-1)≤2-(4/3)x
    8k ^2+20k-3>=0
    x-3+4>2x 1-3x+3<8-x
    11-4x+4<3x-6
    160x+6000-120x<7500
    220+2000-200x>2040
    ((x+205)/(x+233)>=0.95
    12x+100-10x<106
    ((x+205)/x+233)>=0.95
    (x+205/233+x)>0.95
    x^2+45x-1200>0
    abs（-x+3）＜-10
    abs（-x+3）＞20
    （x+3）/(x+2)≤1/（x+2）

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