Assuming you are treating each number as a number and not as an individual unit, the numbers you can make from these digits are 899, 989 and 998.
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32C3 = 4960
45
017, 071, 107, 170, 701, 710. 6 combinations
9*9*9 = 729 using the digits 1 to 9 and 2*9 using 10 and another digit. 749 in all.
-8