4x-9=4x-2
    0.04x∧3+1.04x∧2+x=100
    -2070x^3+165600x^2+449619500x+5.535*10^10=0
    25x^2-36x+20=0
    tanx=2.56/x
    (11*cos(x)-sin(x)*10*sin(x-0.384)/cos(x-0.384))=1.05(11*sin(x)+sin(x)*10)
    (11*cos(x)-sin(x)*10*sin(x-22)/cos(x-22))=1.05(11*sin(x)+sin(x)*10)
    X/193-（100-X）/1000=0.143
    x＾3-4x＾2+1=0
    x^2+250x=900
    x*x+250x=900
    6*（ x- { x }^{ 13 } ） = 0.118(1-x)
     x- { x }^{ 13 } = 0.118(1-x)
    4.8082=（30.56*0.847*（x+0.1））/（1+0.847（x+0.1））*（100-1.4-8.28）/100*1/(1+0.31*1.4)+（2.26（x+0.1））/（1.3*0.101325）
    0.56x^2*(12.7-x)/(0.9+0.2x)=2250*12/4440
    0.56x^2*(12.7-x)/(0.9+0.2x)=2250*12*1.25/4440
    0.56x^2*(12.8-x)/(0.9+0.2x)=2250*12*1.25/4440
    0.56x^2*(12.8-x)/(0.9+0.2x)=2250*12*1.25/2961.8
    0.56x^2*(12.8-x)/(0.9+0.2x)=2250*12/2961.8
    0.56x*(11.2-x)x/(0.9+0.2x)=2250*12/2961.8

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