x^2-10.4 x+ 11.8
    18x^x-6442=0
    12x*x+44x+3=0
    12x*x+44x+2=0
    x²+2x+9
    9x^2+180x+6000=9600
    y+（y-1）/（y+1）-1/y+（1+y）/（1-y）＝3
    2x2+11234x+114514=0
    1÷t
    (1-sqrt(4+3))/(1+sqrt(4+3))=(x+1)/(x-1)
    x+1.5x=150
    5*x*x+12*x+3=0
    0.09*x=90*0.91
    346-346/1.09*0.05-（346/1.09*0.09-X/1.09*0.09）-346*0.03=X
    x²-6x-18=0
    ¾sinx
    2*x+2*(2.76+x)=3*(2.76-x)
    1*2X-1*1.5X=15
    X+X*0.15=8300
    25+x＝32.2+147.9055-x

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