argtan1.5
    (1+x)^10-1=15x
    (1+x)-1=15x
    81减x=9
    x^0.14=0.95
    1/d+1/(d+1)+1/(d+9)=0
    √350=x
    ㏑x=5.86
    ㏑x=2.41
    ㏑x=5.86
    0.05-x/x/x＝1.8*10∧-5
    0.05-x/x∧2＝1.8*10∧-5
    x²*10∧10＝5.6*(0.05-x)
    x²/0.05-x＝5.6*10∧-10
    x²/0.05-x＝5.6*10∧-10
    48÷3x+352÷4x=624
    3×25-3x=9
    95+x÷160+x=0.618
    3×25-3x=9
    12.2x^2-3599.4x-7032=0

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