From the sets given below,select equal sets:
$A=\{2,4,8,12\}, B=\{1,2,3,4\}, C=\{4,8,12,14\}, D=\{3,1,4,2\}$
$E=\{-1,1\}, F=\{0, a\}, G=\{1,-1\}, H=\{0,1\}$

(B=D, E=G) Two sets are equal if they contain exactly the same elements,regardless of the order in which they are listed.
Comparing the given sets:
$A = \{2, 4, 8, 12\}$
$B = \{1, 2, 3, 4\}$
$C = \{4, 8, 12, 14\}$
$D = \{3, 1, 4, 2\} = \{1, 2, 3, 4\}$
$E = \{-1, 1\}$
$F = \{0, a\}$
$G = \{1, -1\} = \{-1, 1\}$
$H = \{0, 1\}$
By comparing the elements,we observe that:
$B$ and $D$ contain the same elements $\{1, 2, 3, 4\}$,so $B = D$.
$E$ and $G$ contain the same elements $\{-1, 1\}$,so $E = G$.
Therefore,the equal sets are $B = D$ and $E = G$.