100+x*6>11x
    -12x+1320>=220
    -(1/45)x^2+4x+60>=220
    xlnx+x-1>0
    2*0.3-4<3m*0.3-6m
    2*0.3-10+6<3m*0.3-6m
    2*2-10+6<3m*2-6m
    2*1-10+6<3m*1-6m
    2x-10+6<3*(1/3)x-6*(1/3)
    2-3m>0
    7(x-1)<4x+3 6(2x/3-1)>=2x-5
    16x>24x-32 9x>7x-6 2(x-4)<=x-6 4+x>5x-24 (x-7)/15<(x-2)/5 x/2-1<=3-3x/2
    16x>24-32 9x>7x-6 2(x-4)<=x-6 4+x>5x-24 (x-7)/15<(x-2)/5 x/2-1<=3-3x/2
    5-2x<2x-1 x+3<2x
    3x-5>2x-1 5x-6>2x
    x+1>=1
    x^3+7>0
    2-（1-x）≤（x/3）+（1/3）
    2-（x-1）≤（x/3）+（1/3）
    25m+15(70-m)>=1425

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