1. (6 points) Add parentheses in the following equation to make it true.
$$
7 \times 9+12 \div 3-2=75 \text{. }
$$
【Answer】Solution: According to the order of operations for mixed arithmetic calculations:
$$
7 \times 9+12 \div(3-2)=75 ;
$$

Therefore, the answer is: $7 \times 9+12 \div(3-2)=75$.