There are: 35C3 = 6545 combinations
233 = 18 combinations.
There are 6C3 = 20 such combinations.
There are 5C3 = 10 combinations.
3 items each in 3 categories gives 3*3*3 = 27 possible combinations.
11*3*3 = 99 combinations.
You could make 10*10*10*26*26*26 combinations, or 17576000 combinations.
There are 9C3 = 84 combinations.
8
9
Once because 7 - 49 = -42 but you can subtract 7 from 49 seven times
There are 32C3 = 32*31*30/(3*2*1) = 4960 combinations. I do not have the inclination to list them all.