x^4-（x-0.02）^4=4.0456752
    sinx+x^2+x=1
    (192.5+309)/31*x+186/31*(x+15)+124/31(x+30)=1122
    X²+3=0
    A -1000- (A-1000）/1.06 × 0.06 - (A-1000）/1.06 × 0.06 ×12% -（A+1000）× 0.03% - (A -1000- (A-1000）/1.06 × 0.06 - (A-1000）/1.06 × 0.06 ×12% -（A+1000）× 0.03% )× 25%=1000×3%
    A -1000- (A-1000）/1.06 × 0.06 - (A-1000）/1.06 × 0.06 ×12% -（A+1000）× 0.03% - (A -1000- (A-1000）/1.06 × 0.06 - (A-1000）/1.06 × 0.06 ×12% -（A+1000）× 0.03% )× 15%=1000×3%
    sin（ln(x)）
    (24+x):3-(4x+8):3=5
    X^3-3X+1=0
    0.0112x/1.01-x=200000*0.06*1.12/1.06-200000
    x/1.01*0.01*1.12+(200000-x)=200000/1.06*0.06*1.12
    x/1.01*0.01*1.12+(200000-x)=200000/1.06*0.06*1.12
    ((24+x)：3)-((4x+8)：3)=5
    ((24+x)：3)-((4x+8)：3)
    xlnx
    (163+312)/31*x+177/31*(x+15)+124/31(x+30)=1266
    (163+312)/31*x+177/31*(x+15)+124/31(x+30)=1266
    x^9＝3^x
    x^9＝3^x
    3^x＝9x

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