2=6-m/m-2
    (1-2x)/3=(3x+1)/7-3
    1/6(3x+-6)=(2/5)x-3
    0.5x-0.7=6.5-1.3x
    4/3-8x=3-(11/2)x
    1.3x+1.25（960-x）=1288
    9x²-30x-7=0
    0.3x+0.25（960-x）=1288-960
    4-3（x-1）=x+12
    3x+3/x
    0.061= -0.0009x2 + 0.0178x + 0.1168
    0.047 = -0.0009x2 + 0.0178x + 0.1168
    （2x+1）/3-(5x-1)/6=-1
    (0.75×x-825)/2200=0
    (sqrt(3)/2)x+1/2(1-x^2)=-1/4
    40t2-87t+32＝0
    16x²+25x+9=0
    sinx+1=sinx^2
    -3lnx
    8.854187817/1000000000000*67.8077/0.000000003*(1.2/2-x*8.314*298.15/96485.33289)-(2*0.6*1000/3.14/0.72/6.02214076/100000000000000)^0.5*(exp(x/2)-exp(-x/2))/2*96485.33289=0

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