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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
65739 = 73044/x // - 73044/x
65739-(73044/x) = 0
65739-73044*x^-1 = 0
-73044*x^-1 = -65739 // : -73044
x^-1 = 21913/24348
-1 < 0
1/(x^1) = 21913/24348 // * x^1
1 = 21913/24348*x^1 // : 21913/24348
24348/21913 = x^1
x = 24348/21913
x = 24348/21913
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