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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3*x-((2*x)/x)+4/3-3 = x // - x
3*x-x-((2*x)/x)+4/3-3 = 0
3*x-x+4/3-3-2 = 0
2*x-11/3 = 0 // + 11/3
2*x = 11/3 // : 2
x = 11/3/2
x = 11/6
x = 11/6
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