(5.8+2*t+8)*(8.4*t+91.90)/(12.6+t)/(6.5*10) >1.6
    (5.6+2*t+8)*(8.4*t+91.64)/(12.6+t)/(6.5*10) >1.6
    (4.6+2*t+8)*(8.4*t+88.30)/(12.6+t)/(6.5*10) >1.6
    －X∧2+9X＞8
    (4.2+2*t+8)*(8.4*t+86.80)/(12.6+t)/(6.5*10)>1.6
    [( n ^ 2 ) * ( 1113.372 + 34.992 * n )]/6 + 8801.321 + 1782.197 * n ≥10262.357 + 1727.686 * n + [( n ^ 2 ) * ( 390.093 + 10.809 * n )]/5
    (n^2)/6*(1113.372+34.992n)+8801.321+1782.197n≥10262.357+1727.686n+(n^2)/5*(390.093+10.809n)
    0.95（17.26+93.51x）<23+65x
    -2048.7065+1146.8248n+n^2/3×(776.346+19.119n)×(2329.038+38.238n)/(1552.692+38.238n)-0.4×n^2×(254.939+4.766n)×（764.817+9.531n）/（509.878+9.531n）≥0
    (2x-0.9)(8x+46.02)/(5.4+x)>75.75
    (2x-1.02)(8x+45.23)/(5.3+x)>75.75
    (2x-0.78)(8x+46.9)/(5.5+x)>75.75
    (2x-0.54)(8x+48.67)/(5.7+x)>75.75
    30×(1-10%)(50-x)+40x≤1480
    -1/(4*a)-(9a)/4+0.4>8
    -1/4a-9a/4+1/2>8
    (3+x)/3>1-(2-x)/2, (-11)/12-(x-1)/3=(3+4x)/5-1, 6x+2(x-4)<=5(x-4)
    -11-4x+4<3x
    13.5z-710<14.25z-835
    6+2x>6-6+3x

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