x>8lgx
    117-117/（1+17%）*17%*（1+7%+3%+2%）=W-W/（1+3%）*3%*（1+7%+3%+2%）
    （1+x/2）^20=2
    -3X^3-X^3=0
    3x^3+X^3
    20x<233
    x+233<233
    x<24
    759.2973×（599.6Y-1568.1）^3 = 3136.2×189302450337.8236
    759.2973×（599.6Y-1568.1）^3 = 3136.2×1893024503378.8236
    759.2973Y×（599.6Y-1568.1）^3 = 3136.2Y×189302450337.8236
    759.2973×（599.6Y-1568.1）^3=3136.2×189302450337.8236
    910000+10x=
    x(30-2x)≥100
    lg3
    X-[(X÷1.06)*0.06+(X÷1.06)*0.06*0.12+（X÷1.06）*0.001]=405064.54
    x+(x*0.5)=1251.28
    1≤1+x∧2≤3
    5-x＞3x-3
    4m^2-8*m+3<0

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