Write brackets ( ) in this statement to make each statement correct. You may use more than one pair of brackets in each statement.
1+8×5+4=731 + 8 \times 5 + 4 = 731+8×5+4=73
3×9+1=303 \times 9 + 1 = 303×9+1=30
12−9×6+2=2412 - 9 \times 6 + 2 = 2412−9×6+2=24
