Mathematics
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    25400/(13.69+254)
    25400/(19.94+254)
    600/x-20-600/x=1.5
    600/x+1.5=600/x-20
    818861.93/10944668477.76
    818,861.93/10,944,668,477.76
    (0.5222 *Z^-1+0.7737*Z^-2-0.8414*Z^-3)(Z+0.2*Z^-1)
    54.785=1.65026+17.05872a-1.45701a^2
    181.665/1101
    1.5^3-1.5-1
    1^3-1-1
    X*68.57%=200
    q(1-q^20)=30-30q
    48.5×595.6+2.14×10^6=541.77y
     (600-x)/[23283.1×0.995+60545.7+(600-x)+(48.5x+2.14×10^6)/541.77]=0.00005
    96/12
    1+1+1+1+1+1+1+1+1
    (40+2x)(3020-20x)
    (40+2x)(3020-20x)
    (4—2x)(30—2x)=600

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