a+0.02a=797181.54
    a+0.02a=10091.05
    tan（0.0385*20）tan（0.0385*x）=2.56
    tan（0.053*21.2）*tan（0.0373*x）=3.934/4.979
    tan（0.053*21.2）*tan（0.0373*x）=3.394/4.979
    x+x*0.03=2144
    tan（0.0373*x）*tan（0.053*21.2）=3394/4979
    tanx*tan1.1236=0.6817
    -0.0015*X^2+0.0142*x-0.0037=0
    （x-1.004）*200-0.1=2
    200（1-x）^2=128
    200（1x2）^2=128
    X*1.13+（902240-X）*1.03=988870
    X*1.13+（1-X）*1.03=988870
    (184-4x)(180-3x)=5310
    -8m^5+9m^4-6m^2+8m+9=0
    （84+a）/（70+a）=1.1
    84+a/70+a=1.1
    297500+1013286.4+(x-150)*180*385=(150+12-x)*180*385+22*180*385
    k^3-2k^2+8=0

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