a, b, c are integers. |a| ≠ |b|≠ |c| and –10

Question

a, b, c are integers. |a| ≠ |b|≠ |c| and –10 < a, b, c < 10. What will be the 
maximum possible value of
[abc – (a + b + c)] ?

Keshav A V · Answer

Hi ravi,
The correct answer is 514
$$\left[\left(-9\cdot -8\cdot 7\right)-\left(-9-8+7\right)\right]=514$$

a, b, c are integers. |a| ≠ |b|≠ |c| and –10 < a, b, c < 10. What will be the maximum possible value of [abc – (a + b + c)] ?