1.4sin(4x)=1
    324x＋709x＝2066
    x+2=-9
    2.5lnx=23.1339+31090/x
    2.5lnT=23.1339+31090/T
    （x-0.218）^(2)÷0.109^(2)=51.5
    （x-0.218）^(2)÷（0.109）^(2)=51.5
    x^(2)÷（0.1-x）^(2)=85
    x-420.48-[(x-420.48)-5000]*0.03=10000
    3sin(4x)=0.7
    6.25*x=(5/6+1/6*x^2)^3
    tanx+2x=π
    (√(500,000*e^(−30,000÷1.987×(1÷323−1÷x)))÷(1+√(500,000*e^(−30,000÷1.987×(1÷323−1÷x))=(x-300)÷600
    1-5x^-1+6x^-2=0
    1.5*x*3.14*x^2=696
    x*sqrt(x^2+1)=12
    x-1/x=6.03
    6*x*3.14*x^2=696
    x=1
    6*x+3.14*x^2=696

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