3x^2+28x+48=0
    x^3-10x-3=0
    2x^3+11x^2+20x+8=0
    0.04439960215340382*cos(x)+0.9980267284282714*sin(x)-0.00353320807701389*x+1
    x^4+6x^3+12x^2+6x=0
    x-6%÷1%=0.1105
    192176.40*(1+X)*(1+X)*(1+X/2)=473512.49
    -10+5(1+x)^-1+5(1+x)^-2+5(1+x)^-3-4(1+x)^-4+5(1+x)^-5=0
    x-23%x=80
    4x^3+12x^2+22x+14=0
    x^4+4x^3+11x^2+14x+10=0
    X-0.02X-(X/1.09*0.09*1.12)-X/1.09*0.8-17.68=0
    (X-6970)/(760-6970)=(500-480)/(540-480)
    X-6970/7600-6970=500-480/540-480
    2x^3+35x^2+100x+112=0
    x²+1除以x
    2x^3+35x^2+100x+12=0
    x^2＝6×(120-x)
    x^2-110x+2200=0
    X+5=X×1.2

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