5. Fill in the following equation with the digits $1,2,3,4,5,6,7,8,9$ to make the equation true.
$$
\mathrm{O}+\mathrm{O}=\mathrm{O} \times \mathrm{O}=\mathrm{OO}=\mathrm{OO} \div \mathrm{O}
$$
【Analysis】Fill in the operators cleverly. $5+7=3 \times 4=12=96 \div 8$.