x1/3+3x=6
    sinx=0.955
    cotx=0.5
    cotx=0.5
    cotx=0.5
    tanx= 0.373
    tanx=0.373
    y^2+2y-9998＝0
    x^3=16/50
    (1/x)+(1/(x+1))+(1/(x+5))+(1/(x+10))=0
    (x-22)/x=77%
    43*y^2-64*y-80=0
    1800-702.739÷（0.13+0.000198X）=X
    (x-76.23)/x=10%
    4a*a+3a+2=0
    1800-504.5÷（0.13+0.000099×900+0.000099X）=X
    (x-8.27)/x=98%
    X^2-1800X+504.5=0
    1-(y^2/sqrt((1-y^2)^2+1.69y^2))=0.02
    1-(y^2/sqrt((1-y^2)^2+1.69y^2))=0.01

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