0.01=2.4×(1.1-x)×(1.1-x)×(1.1-x)
    x²+1.36x-0.882＝0
    x²＋0.73x－0.441＝0
    (x×2×0.75)÷2 = 38
    x×2×1.75 = 38
    x×2×1.25 = 38
    x×2×7.5=38
    x*2*0.75=38
    10x+2.5e^(-4x)=5.7
    a²+9=3a
    173965646.185+3294.76*(3264y-150103.05)/5/(2601y+652.8)+895.44*(3264y-150103.05)/5/(2601y+652.8)y=15.21y
    2sinxsinx－cosxcosx－2sinxsin45=0
    cos(2x)+√2sinx=0
    0.375=x^0.06
    （x-5.875）*200-0.1=4
    （x-5.875）*200-0.1=2
    （0.1+x）/（1-x）（0.1-x）=2.98
    20（x-1）+30（x+1-1.5）=90
    B*B+B＝600
    (-2*10^4*x^2+15*10^3)*(8.5*10^6-50*10^6*x^2)-25*10^8 = 0

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