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    sqrt(x^2-9)+sqrt(x^2-16)=sqrt(46)/2
    a*4=a+36
    38.69x^5-725.21x^4+5303x^3-17854x^2-27201x-13883=0
    300/x=300/4/5x➕3
    4a-1=3
    y=2y/4+3
    2y/4+3
    220=x×31+x×21+x×10
    -x*x+36x=180
    (x*92%)+(x*92%*6%)=42736.22
    (x*92%)+(x*92%*6%)=435682.4
    14+(1/4)x-2=(3/4)x+2
    14+(1/4)x-2=(4/3)x+2
    14+4/1x-2=4/3x+2
    x²+5x=2250
    150y-y^2=3600
    1/2-x/2=2-x
    2210492.13-x-0.05x-650+12611.59=663041.07
    2x^2+2x=11
    8x+x+4=11

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