Use $2$ $0$ $1 $ and $9$ to make the numbers $66, 74, 76, and$ $77$
You must use all 4 digits. Only the digits 2, 0, 1, and 9 can be used. You can make multi-digit numbers out of the numbers. Examples: 20, 92, 2.9
The square function may NOT be used. Nor may the cube, raise to a fourth power, or any other function that raises a number to a specific power. You may use the ^ operation if you use a digit, for example, [(9 + 1)^2 - 0!] is acceptable (if you're trying to get 99), because 2, 0, 1, and 9 is used. However, [20 ^ 2 / 9 + 1] can't be used to get 40 because it uses an extra 2.
Sorry, but the integer function may NOT be used. Nor may the round, floor, ceiling, more than 2 factorials in a row, repeating symbol, or truncate functions.
+, -, *, /, (), !, sqrt, ^, and !! may be used for functions.
I picked these because these are the hardest for 2019. From the numbers 1-100, these are the only ones I didn't get.
Again, no brute-force methods. Good luck.