（2x-1）^2+3（2x-1）+2=0
    x∧4＋2x∧3＋2x∧2＋6x＋9＝0
    4x+x/2
    x-10+x+1+x/2+2x
    0.04x^3＋1.04x^2+x－10000 = 0
    506＝0.15x+(2000-x)0.35
    4.5x-9=4x-2
    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)

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