xxxxxxxxx+6xxxxxx+4xxxx+13xxx+7xx+2x=3660
    x^3+x^2-11/12*x-2/3＝0
    （X-X/1.13*0.13）/7.27=0.51
    （X-X/1.13*0.13）/7.27=0.433
    （X-X/1.13*0.13）/7.27=1.595
    （X-X/1.13*0.13）/7.27=0.318
    （X-X/1.13*0.13）/7.27=0.0728
    （X-X/1.13*0.13）/7.27=0.728
    x+1=2^（1-x）
    x+1=2^1-x
    x^2=2^x 2x^x=x2^x x^2=x*2^x 2*x^2=x*2^2 x2^2=2x^2
    x^2=2^x
    x^2+24x+12=0
    2√3/5=[(√3-3)/(√3-2x)]{(-8√3x)/[4(x^2)+3]+(√3/x)}
    -2/3xx+2x=2
    1.5x*8+1.2x*2-10x=1.5x*10-10x-390
    (20+2x)(40-x)=1300
    (20+2x)(40-x)=1200
    3k^3+30k^2+63k-108=0
    x^3+12x+9=0

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