The given expression involves addition, multiplication, and subtraction. Following the order of operations, we first perform the multiplications: 1.2 multiplied by 10 equals 12, and 1.4 multiplied by 5 equals 7. Next, we perform the additions and subtractions from left to right: 5 plus 12 equals 17, and 17 minus 7 equals 10. Therefore, the final answer is 10.