mathematical puzzles

?How do you create 79 from just using 2, 0, 1, and 7

This was quite hard but here’s my solution:

(1 & (0!)) * 7 + 2

The & being a concatenation tool for string mechanics in programming.

Together, this makes:

0! = 1

1 & 1 = 11

11 * 7 = 77

77 + 2 = 79

I see nothing saying it had to be strictly mathematical.