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D( x )
x = 0
x^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
3/x-((5*x)/(x^2))-196-14 = 5/x+14 // - 5/x+14
3/x-((5*x)/(x^2))-(5/x)-196-14-14 = 0
3/x-5*x^-1-5*x^-1-196-14-14 = 0
-7*x^-1 = 224 // : -7
x^-1 = -32
-1 < 0
1/(x^1) = -32 // * x^1
1 = -32*x^1 // : -32
-1/32 = x^1
x = -1/32
x = -1/32
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