0.696=-2E-06x^2+0.0026x+0.1629
    16900x²－2081x+8=0
    3150.82-3150.82*sqrt(1-x^2)+1165.8*x =930.06
    3087.49-3087.49*sqrt(1-x^2)+1228.36*x =900
    x+x²=133
    x+x²=133
    x/(1-x)^1.5=2*0.7/(1-0.7)^1.5
    X/141-（95-X）/1000=0.47
    3xxxx+16xxx+26xx+16x=0
    x*x*x+7*x*x+16*x+8=0
    y=0.064 0.118 0.138 0.167 0.179 x=0.000875 0.0013125 0.00175 0.0021875 0.002625
    0.237sinx+0.01(1+sinx)cos(x-5)=0.0483cos(x-5)
    204X+42(X+30)+12X*4/5=219300
    27×a^25+30×a^24+30×a^23=178.245993
    204X+42(X+30)+12X*4/5
    27×a^11+30×a^10+30×a^9=117.9437
    27×a^20+30×a^19+30×a^18=153.8220
    27×a^15+30×a^14+30×a^13=132.7190
    27×a^8+30×a^7+30×a^6=101.645198
    27×a^9+30×a^8+30×a^7=111.210355

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