x^4+38*x^3+1089*x^2-532*x+16>0
    -3
    -3
    -3=
    x^2－25x－300≥0
    (1-2*x)(x+2)>0
    -x+4x-4<0
    x²-3x-10>0
    -4114150+3000000+y-450000-y*10%÷4≥300000
    -4114150+3000000+y-450000-y*10%÷4≥300000
    -4114150+3000000+y-450000-y*10%÷4≥300000
    X(6x+5) <4
    x∧2-3x>4
    x^2-3x≤4
    x^2-3x≤4 x^2-3x>4
    xx-3x-10>0
    13-xx<-3
    -xx+4x-4<0
    （4x加10）减（9x减6）大于6
    5x加10大于等于2（x减1）

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