1.5x-0.5+(5x-1)/3=2
    （2x-1）/3=1-0.5x+1
    x-1/3＝1-2/3×x+1/6
    4*x^4+32*x^3+12*x^2+16*x-1=0
    4x^4+32x^3+12x^2+16x-1=0
    (3x-9)x=-12x
    x=7
    （(4226.11+65.73-X-6139.93)/6139.93)*0.5=((1668.51+64.99+X)-3716.13)/3716.13
    （32+x）*3-（32-x）*4=10
    cosx=0.46
    27.5-[(10-x)^2]÷10 = 10x-(x^2)÷2
    27.5-(10-x)^2=10x-(x^2)÷2
    (0.0000005-x)^2=x
    1.2^x=1500
    12.7%+x+12.7%x = -1.7%
    12.7%+x+12.7%+12.7%x=-1.7%
    24.2%+x+24.2%x=6.4%
    12.7%x+12.7%+x=1.7%
    5x^2-32x+52=6.25（x-5）^2
    5x^2-32x+52=4x^2-40x+100

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