(10000/162)*x+(150-10000/162)*x=25100
    (10000/154)*x+(150-10000/154)*x=25100
    (10000/154)*x+(150-10000/154)*x=25000
    (10000/154)*x+(150-10000/154)*x=27500
    (10000/154)*x+(150-10000/154)*x=27600
    (10000/154)*x+(150-10000/154)*x=27600
    (10000/154)*x+(150-10000/154)*x=30000
    2x-6=0
    2x=6
    x^-2x+9=0
    x^2-72x-352=0
    (16+2x)^2
    x^(1/x)=(x-2)^2
    x^(1/x)=x+1/x-1
    x^2+x=420
    x×x×x-10^（-12）×x×x=10^（-10）×x+10^（-21）
    x^2-25x+150=0
    x^(1/x)=(x-1)^2
    (1/18)*x^2-2x-45/2=0
    0.2+aretan(31.825)*0.2/3.14=

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