A nice Friedman number is one that can written in a non-trivial way using its digits in order, together with some of the symbols + - × / ( ) . Exponentiation and concatenation are also allowed. For example, 127 = -1 + 27. Find the solutions for the other nice Friedman numbers below. See the solutions.
1. 343
2. 736
3. 1285
4. 2187
5. 2502
6. 2592
7. 2737
8. 3125
9. 3685
10. 3864
11. 3972
12. 4096
13. 6455
14. 11264
15. 11664
16. 13825
17. 14641
18. 15552
19. 15585
20. 16377
21. 16384