x+9108+(x+9108)*0.003=5223.92*7.1788
    x+9108+(x+9108)*0.003=5223.92+7.1788
    x+9108+(x+9108)+0.003=5223.92+7.1788
    11.5/(1+x)+11/(1+x)^2+11.6/(1+x)^3+12.7/(1+x)^4+13.1/(1+x)^5+13.8/(1+x)^6+14.8/(1+x)^7+15.5/(1+x)^8+16.2/(1+x)^9+17.7/(1+x)^10+17.7*1.02/(x-0.02)(1+x)^10-203.13=0
    11.5/(1+x)+11/(1+x)^2+11.6/(1+x)^3+12.7/(1+x)^4+13.1/(1+x)^5+13.8/(1+x)^6+14.8/(1+x)^7+15.5/(1+x)^8+16.2/(1+x)^9+17.7/(1+x)^10+17.7*1.02/(x-0.02)/(1+x)^10-203.13=0
    x+1=9
    2X^2+103X-3820=0
    2X^2+130X-3793=0
    1000*（X-180）=1500*（X-500）
    0.0313÷x＝0.1289÷0.86289
    0.4÷100.58＝x÷7.86
    sinx=0.5
    1*174+x*80=（1+x）*160
    99×h÷2
    99X÷2
    4x^2-4=x^3+x^2
    (3x^2)/4+(x/2-(5-x))^2=7
    (3x^2)/4+(x/2+(5-x))^2=7
    a（a+1）=300
    （x-40）（140-2x）=800

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