nmslkun=1
    x^2-2x+0.7=0
    (NMSLKUN)=20172-(NMSLKUN)
    NMSLKUN=20172-NMSLKUN
    80-2x-4x=20
    4x减3加3x=6x减2
    3.234x+1825.29x^0.4=100000
    x^2-3x+1=0
    11.28x^3+40.94x^2-357.80x-3513.46=0
    4x减3加3x等于6x减2
    9((550-11x)/16)(2x+((550-11x)/16)-50)=25(50-x-((550-11x)/16))^2
    9((550-11x)/16)(2x+((550-11x)/16)-50)=25(50-x-(550-11x)/16)^2
    9((550-11x)/16)(2x+(550-11x)/16-50)=25(50-x-(550-11x)/16)^2
    (9+(4*(1+9*x^2)-9*x)^2)/(1+9*x^2)-16/5
    (9+(4*(1+9*x^2)-9*x)^2)/(1+9*x^2)
    11.28x^3+51.02x^2-251.08x-2400.47=0
    XxX=X
    0.75x+100=0.95x-140
    0.75x+100=0.95-140
    lgx=-0.0362

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