5550 and 1=1
    5550 and 1=2
    n^3＋n＝10
    n²＋n＝6
    X+10%X=0.7
    5x^4-(20/9)*x^2-(40/3)*x^2=20
    (x-1)/(2x+1.9)=1.5/5.5
    -1²-（1/2-2/3）÷ 1/3x[-2+（-3）²]
    a²-12a=-36
    a^3-5a-2.4=0
    lnx-1／x
    !(x)=40320
    36x^16=6/x
    3x^3=26x^2
    3x=2
    123-3x=98^x
    123-3x=98^x
    ln(x^2)=x
    27x^2+172x-192=0
    x=lnx

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