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    10÷2^k=5
    24÷2^k=3
    a-(-a)=12
    -2-m=5
    2x+5=3x+4
    (x+3)/2=2x
    (x+3)/2=1/(2x)
    19x2-64x+52=0
    3(2y-2)-(2y+3)=1
    (-2-k)/3-(-1-3k)/2=1
    x^4+x^3+x^2+x=0
    x^4+x^3+x^2+x=100
    400-40x=256-25.6x
    x^2+x=120
    8x-7=10x-1
    -6.659x²+35.102x+64.366=80
    x-sinx/e^x
    60+300*x=80+250*x
    x²-5x+1
    8(3x)

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