12198.1675/x=218-x*1219.81675
    y=220-1219.81675/y-2
    x^2-x-312=0
    x+(x×0.05)=4792
    （600-20X）（X+1）=2600
    16891.046748014/122.5 = 150*x+95*((x^2+1)^0.5-1)/((x^2+1)^0.5+x)-(((x^2+1)^0.5-0.5)*x-((3.14159/2-arctan(1/x))*(x^2+1)/2))*95*95/(122.5*(x+(x^2+1)^0.5)^2)
    33166.10574929/150 = 150*x+95*((x^2+1)^0.5-1)/((x^2+1)^0.5+x)-(((x^2+1)^0.5-0.5)*x-((3.14159/2-arctan(1/x))*(x^2+1)/2))*95*95/(150*(x+(x^2+1)^0.5)^2)
    49522.3110700313/177.5 = 150*x+95*((x^2+1)^0.5-1)/((x^2+1)^0.5+x)-(((x^2+1)^0.5-0.5)*x-((3.14159/2-arctan(1/x))*(x^2+1)/2))*95*95/(177.5*(x+(x^2+1)^0.5)^2)
    82733/242.5 = 150*x+95*((x^2+1)^0.5-1)/((x^2+1)^0.5+x)-(((x^2+1)^0.5-0.5)*x-((3.14159/2-arctan(1/x))*(x^2+1)/2))*95*95/(242.5*(x+(x^2+1)^0.5)^2)
    99657.2299078741/280 = 150*x+95*((x^2+1)^0.5-1)/((x^2+1)^0.5+x)-(((x^2+1)^0.5-0.5)*x-((3.14159/2-arctan(1/x))*(x^2+1)/2))*95*95/(280*(x+(x^2+1)^0.5)^2)
    (X+5)*e^X
    4(t+16)^(-1)+9t^(-1)=1
    4(t+16)^(-1)+9t(-1)=1
    （3/4）*x+(3/5)*(57-x)=x*(4/5)
    x（10-2x）²
    x（10-2x）²
    x（10-2x）
    x*5+4^x=6
    x/5+4^x=1
    17.4*0.005/(17.4-x)+7.18*0.2492/(7.18-x)+0.4/(5-x)+2.17*0.0953/(2.17-x)+2*0.0288/(2-x)+0.5417/(1-x)=0

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