13x=（3.5+x）×7.96
    X+3＝8
    120*x+(3*x-120)*((1+1/4)*x)=3-1/5
    lnx＝6-2x
    x^2+41x+41=0
    （x＋10）＋（x-10）＋（x÷2）＋（2x）=270
    K^3-K^2-2K+1=0
    a^3-a^2-2a+1=0
    x^3-3x-2=0
    a^3-2a^2-a+1=0
    108*x^2-46*x-37=0
    a^3-2a^2-a+1=0
    x+12=34
    a∧3-6a∧2-6a-352＝0
    16÷2X=4
    x=1/2
    x*x*x+2*x*x+3*x+4=0
    x0*x0*x0+2*x0*x0+3*x0=0
    7400x/7800=sinx
    5t²+4t-26

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