880.180≤2/3×14.3×785×0.5×(sin(3.1416x))^3/3.1416+(x×14.3×785×（1-sin(2×3.1416x)/(2×3.1416x))/(1.25-3x)×0.4375/3.1416×((sin(3.1416x)+sin(3.1416×（1.25-2x)))
    880.180≤2/3×14.3×1000×0.785×0.5×(sin(3.1416x))^3/3.1416+(x×14.3×1000×0.785×（1-sin(2×3.1416x)/(2×3.1416x))/(1.25-3x)×0.4375/3.1416×((sin(3.1416x)+sin(1-2x))
    880.180≤2/3×14.3×1000×0.785×0.5×(sin3.1416x)^3/3.1416+(x×14.3×1000×0.785×（1-(（sin2×3.1416x）/(2×3.1416x)))/(1.25-3x)×0.4375/3.1416×((sin3.1416x)+sin(1-2x))
    880.180≤2/3×14.3×1000×0.785×(sin3.1416x)/3.1416+(x×14.3×0.785×（1-(（sin2×3.1416x）/(2×3.1416x)))/(1.25-3x)×0.4375/3.1416×((sin3.1416x)+sin(1-2x))
    （20/u）/(1-100/(u^2))<7
    √{{k+√[k^2+(sin54)^2-2*k*(sin54)^2]}^2+k^2-2*k*{k+√[k^2+(sin54)^2-2*k*(sin54)^2]*cos72}} < cos54+1-k
    y+(56-6y)/5<10
    y+(56-6y)/5<0
    √{{k+√[k^2+(sin45)^2-2*k*(sin45)^2]}^2+k^2-2*k*{k+√[k^2+(sin45)^2-2*k*(sin45)^2]*cos90}} < cos45+1-k
    1-(1-8x^2)^(1/2)<2x
    (2x^2+12)/(x^2-x+12)>2-1/x
    2^x+6*2^(-x)<7
    2^x+6*2(-x)<7
    5*x+2>3*(x-1) 0.5*x-1≤7-1.5x
    k^3-2k^2+k-2<0
    k^3-2k^2+k<2
    k^3-3>0
    {{k+[k^2+(sin30)^2-2k*(sin30)^2]^(1/2)}^2+k^2-2k{k+[k^2+(sin30)^2-k(sin30)^2]^(1/2)}}^(1/2) <= sin30+1-k
    10000+X-X*10%/4>300000
    b+sqrt(b^2-3)>1

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