x^2+8x+8=0
    6x^2-x-3=0
    x^2-12x-6=0
    2㏑x+3x＝0
    8x-x=
    ex+e-x
    a×0.6=44.9
    a×0.6=34.9
    a×0.6=24.9
    a×0.6=14.9
    a×0.6=14.9
    n²-n=270
    x+0.06x=11374.9
    x+0.06x=11374.9
    3/4X=27
    （4x+40）/（5x+39）=6/7
    10：7＝x：（255-x）
    （1+y）＾5=1/2
    e∧cosx
    X-X/1.01*0.01-(X-X/1.01*0.01)*0.043=687680.51

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