11x+1=5(2x+1)
    4x-8=7-x
    3x+3=2x+7
    5x-2=8
    X(X+1)=2024
    7x+47=180
    2x—68＝x
    x^2+x=600
    0=9a^4+40a^3+46a^2+16a−11
    -0.2x=-8
    0.2x+89=0.5（1200-x）
    xe^(-x)=2
    x*e^(-x)=2
    x(1+e^(-x))=4
    0.7X+0.9(160-X) = 136
    0.7X+0.9(160-X)=136
    arctanx+arctan10x = 30
    -1.042x^2+12.054x+2.438=34.32
    9/8*x^2+1+10=0
    9/4*m^2-m-10=0

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