12+9-7*6*4:2-7+5 * = kali

12+9-7x6x4:2-7+5
12+9-168:2-7+5
12+9-84-7+5
21-84-7+5
-63-7+5
-70+5
-65

12 + 9 - 7 × 6 × 4 ÷2 - 7 + 5
= 12 + 9 - (7 × 6 × 4 ÷ 2) - 7 + 5
= 21 - (42 × 4 ÷ 2) - 2
= 21 - (168 ÷ 2) - 2
= 21 - 84 - 2
= -63 - 2
= -65