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D( a )
3*a^2 = 0
(3*a^2)^0 = 0
3*a^2 = 0
3*a^2 = 0
3*a^2 = 0 // : 3
a^2 = 0
a = 0
(3*a^2)^0 = 0
(3*a^2)^0 = 0
1 = 0
(3*a^2)^0 = 0
1 = 0
a belongs to the empty set
a in (-oo:0) U (0:+oo)
(6*(-2*a^5)^2)/((3*a^2)^0) = 0
6*(-2*a^5)^2 = 0
24*a^10 = 0 // : 24
a^10 = 0
a = 0
a in { 0}
a belongs to the empty set
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