5t²－12t＋2=0
    8x^2-65x+52=0
    log（x，x^2）=-x
    log（x，0）=1
    x^x
    x^2-4x-5=0
    x²+1=0
    wws
    420=-2x^2+48x+224
    2^n+n＝854
    2^n-n＝854
    2^（n-1）-n＝854
    (sqrt(12)*sqrt(12)+1/4)^(2)/(4*sqrt(12))-1/12=x
    15 k^2-40 k+24=0
    108*x*x*x*x+18*x*x-9/4=0
    6+7x=97
    6x=66
    a+1=3
    3x^2-100x+1600=0
    (490*0.3585)/3=x/((1-x)*(3.16-(6/4)*2.03x)^2)

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