If + means -, - means $$ \times $$ , $$ \times $$ means $$ \div $$ and $$ \div $$ means +, then
$$ 12 \times 4 \div 12 + 5 - 3 = ? $$
After substituting the operators as per the code, we get 12 $$ \div $$ 4 + 12 - 5 x 3 = 0
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