151800*x^3*（1-x)^97+4950*x^2*(1-x)^98+100*x*(1-x)^99+(1-x)^100=0.95
    151800*x^3*（1-x)^97+4950*x^2*(1-x)^98+100*x*(1-x)^99+(1-x)^100≥0.95
    －x∧2+5x>0
    －x+5x>0
    100*sqrt（1-v^(2）)>434*(v^(-1)-v)
    100*sqrt（1-v^2）>434*(v^-1-v)
    7.28/(0.13×d)+2×9.460.13×d^2+12（2×7.280.13×d+4×9.460.13×d2）2+4×7.2820.132×d2≤19.1×1000
    0.02x+2000>0.04x+1800
    2 * x ^ 2 + 11 * x + 12 ≥0 （1）
    3x-1≥2x
    x-3≤3x+15
    x+1≤3x+2
    3（x--1）≤-5（x+1） 13-x/3<4x
    3x>x-5/2
    2x+7≥5（x-1）
    2x+3<1
    x>0.5(x-3)
    4x^2+21x+84x+441<21+11x
    （x+100）÷240-x÷280≥0.6
    437.09≤2/3*14.3*3.14/4*sin(3.14*x)*sin(3.14*x)*sin(3.14*x)/3.14+x*14.3*(1-sin(2*3.14*x)/(2*3.14*x))/(1.25-3*x)*(sin(3.14*x)+sin(3.14*(1.25-2*x))) /3.14

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