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    3x=9
    128x^6+x^5×256÷9-27√3×x^4-12√3×x^3-x^2×√3×4÷3
    (3x+2)2-8(3x+2)+15=0
    x+9=10
    x*0.9*2.68=3.24
    r*12.5*1.67*0.4/(1-r*12.5*1.67*0.4)=0.3
    139=42+57+88-(30+12+30+12+30+12)+12+x
    9+8-x=13
    r*12.5*1.67*0.4/1-r*12.5*1.67*0.4=0.3
    400-y=8
    16+X/X=3/√3
    x:0.25+6=6.25
    6x+2.7×3=10.5
    (126-2.4x):6=19
    9+8-x=13
    -e^x-1
    60=20√3+√3X+X
    12-4(X+3)=-7(x+3)
    13.8÷x=3
    a*a+a=42

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