−2x+10=3−x
    −2x+10=3−x
    115.5X+29*116.2=（X+29）*116
    115X+29*116.2=（X+29）*116
    X/sqrt2=X-3
    sqrt2*X=X-3
    sqrt2*X=X-3
    sqrtX=X-3
    -x^3+2x^2+x-1＝0
    xx+x=210
    xx+x=210
    xx+x=240
    16*x^2+x^4=225
    X➗（100+X）=20%
    4x=x+99
    9x²-620x+800
    9x²-120x+800
    669=8790-30x+0.0000005.68×x＾4
    669=8790-30x+0.0000005.68x＾4
    669=8790-30x+0.00000005.68x＾4

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