x^2-0.312x+0.02=0
    1000*(1+X)^2=1160
    （X×5）（X×7）=89999
    X×（36-2x²+2）=180
    X×（36-2x+2）=180
    300÷X=300÷(X-1)-10
    （1+X）^5 = 1.6
    （1+X）²=1.6
    4800=x+2700
    6000x=1000
    6000=1000x
    (98X+35)÷X+23=98
    x^0.68=5426.7045
    x^(0.68)=5426.7045
    （1+x）＾1/x
    x^5+6x^4+2x^2-7x+1=0
    （3x+10）*42x/(7x+10)-18x=32
    2^x+x=5
    x^3-2x^2-4x-7=0
    9/200*x=185-x

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