3s^2+6s+2=0
    3s*2+6s+2=0
    x²+x=270
    3x*2+6x+2＝0
    x*2+x=270
    1+X/1+0.02-1=0.1
    1+X/1+2%=10%
    2*lnx+3=0
    √2 x^2=7 x+2√2 x-14
    x^2-28x+125=0
    5/7x-2/7x=21
    √2 x^2-√2 x-7x+7=0
    b²-150b+3600=0
    4x^3+15x^2+16x+6=0
    X + (x*0.225) = 38600
    X^2=3.1415926
    4x^3＝12.5(500－x)^2
    0.201＝0.031x+0.054
    x^5+2*x=1000
    2x^3+11x^2+20x+8=0

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