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    x²+x+2.25=0
    x(60-x)=864
    x+1.4x-2x*x=0.08
    X*(X+1)=6006
    cosx=1.239sinx
    N*(N+1)*25=21000
    N*N+N=840
    a∧3+2a^2-a+1=0
    a∧3+2a^2-a+1=0
    a∧3+2a^2-a+1=0
    a∧3+2a^2-a+1=0
    a∧3+2a^2-a+1=0
    (100+200x)(2-x)=300
    (30-2x)(24-2x)=80
    x-24.52=91%
    (100+200x)(4-2-x)=260
    (100+200x)(2-x)=260
    361+361×18a%=3610
    60/3x=30
    15x×x-21.6x-8.4

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